diff --git a/.gitlab/scripts/translation.sh b/.gitlab/scripts/translation.sh
index e6393c5933..4410ae57bb 100755
--- a/.gitlab/scripts/translation.sh
+++ b/.gitlab/scripts/translation.sh
@@ -1,3 +1,8 @@
 #!/bin/bash
-export VELOREN_ASSETS="$(pwd)/assets"
-time cargo test --package veloren-voxygen-i18n --lib test_all_localizations -- --nocapture --ignored
+VELOREN_ASSETS="$(pwd)/assets"
+export VELOREN_ASSETS
+
+time cargo test --package veloren-voxygen-i18n \
+    --lib test_all_localizations \
+    --features="stat" \
+    -- --nocapture --ignored
diff --git a/Cargo.lock b/Cargo.lock
index c5b7100f38..4376986dca 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6908,9 +6908,11 @@ dependencies = [
 name = "veloren-voxygen-i18n"
 version = "0.13.0"
 dependencies = [
+ "clap 3.1.10",
  "deunicode",
  "fluent",
  "fluent-bundle",
+ "fluent-syntax",
  "hashbrown 0.12.0",
  "intl-memoizer",
  "ron 0.7.0",
diff --git a/common/assets/src/walk.rs b/common/assets/src/walk.rs
index 976e325f85..b1c7ecbf0c 100644
--- a/common/assets/src/walk.rs
+++ b/common/assets/src/walk.rs
@@ -3,16 +3,54 @@ use std::{
     path::{Path, PathBuf},
 };
 
-/// Read `walk_tree`
-#[derive(Debug)]
+/// Represent tree of directory, result of [generate_tree].
+///
+/// Note that paths are always relative to root it was generated from.
+#[derive(Debug, Clone)]
 pub enum Walk {
+    /// Represents file node, path is relative to directory root Walk was
+    /// generated from.
     File(PathBuf),
+    /// Represents directory subtree, path is relative to directory root Walk
+    /// was generated from.
     Dir { path: PathBuf, content: Vec<Walk> },
 }
 
-/// Utility function to build a tree of directory, recursively
-///
-/// At first iteration, use path to your directory as dir and root
+impl Walk {
+    /// Utility function to build a tree of directory, recursively
+    ///
+    /// Path needs to be absolute.
+    pub fn generate(root: &Path) -> io::Result<Walk> {
+        let trees = walk_tree(root, root);
+        Ok(Walk::Dir {
+            path: Path::new("").to_owned(),
+            content: trees?,
+        })
+    }
+
+    // TODO: implement iterator?
+    pub fn for_each_file<F>(&self, root: &Path, f: &mut F)
+    where
+        F: FnMut(&Path),
+    {
+        match self {
+            Self::File(filepath) => {
+                let path = root.join(filepath);
+                f(&path);
+            },
+            Self::Dir {
+                path: _,
+                content: files,
+            } => {
+                for path in files {
+                    path.for_each_file(root, f);
+                }
+            },
+        }
+    }
+}
+
+/// Helper function to [Walk::generate()], prefer using it instead.
 pub fn walk_tree(dir: &Path, root: &Path) -> io::Result<Vec<Walk>> {
     let mut buff = Vec::new();
     for entry in std::fs::read_dir(dir)? {
@@ -37,3 +75,15 @@ pub fn walk_tree(dir: &Path, root: &Path) -> io::Result<Vec<Walk>> {
 
     Ok(buff)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn trie() {
+        let root = crate::find_root().unwrap();
+        let assets = Path::new(&root).join("assets/");
+        Walk::generate(&assets).unwrap();
+    }
+}
diff --git a/voxygen/i18n/Cargo.toml b/voxygen/i18n/Cargo.toml
index 89c784aa73..c5ff1c56d7 100644
--- a/voxygen/i18n/Cargo.toml
+++ b/voxygen/i18n/Cargo.toml
@@ -19,3 +19,14 @@ fluent-bundle = { git = "https://github.com/juliancoffee/fluent-rs.git", branch
 hashbrown = { version = "0.12", features = ["serde", "nightly"] }
 deunicode = "1.0"
 tracing = "0.1"
+# Bin
+clap = { version = "3.1.8", features = ["suggestions", "std"], default-features = false, optional = true }
+fluent-syntax = { git = "https://github.com/juliancoffee/fluent-rs.git", branch = "patched"}
+
+[[bin]]
+name = "i18n-check"
+required-features = ["bin"]
+
+[features]
+bin = ["clap"]
+stat = []
diff --git a/voxygen/i18n/src/analysis.rs b/voxygen/i18n/src/analysis.rs
new file mode 100644
index 0000000000..396bc1b292
--- /dev/null
+++ b/voxygen/i18n/src/analysis.rs
@@ -0,0 +1,148 @@
+use crate::{assets::Walk, error::ResourceErr};
+use fluent_syntax::{ast, parser};
+use std::{
+    fs, io,
+    path::{Path, PathBuf},
+};
+
+/// Generate tree of i18n files, path should be absolute.
+/// We assume that all i18n directories should have the same tree structure,
+/// so that we can generate tree once and reuse for all languages.
+fn i18n_tree(reference: &Path) -> io::Result<Walk> { Walk::generate(reference) }
+
+/// Grab keys from one file
+fn keys_from_file(filepath: &Path) -> Vec<MsgId> {
+    use ast::Entry;
+
+    let file = format!("{}", filepath.display());
+
+    let content = match fs::read_to_string(filepath) {
+        Ok(content) => content,
+        Err(e) => {
+            eprintln!("failed to read from {filepath:?}. err={e}");
+            return Vec::new();
+        },
+    };
+
+    let ast = parser::parse(&*content).unwrap_or_else(|(_parsed, errs)| {
+        panic!(
+            "{}",
+            ResourceErr::parsing_error(errs, file.clone(), &content)
+        )
+    });
+    let mut keys = Vec::new();
+    for entry in ast.body {
+        match entry {
+            Entry::Message(m) => {
+                keys.push(MsgId {
+                    key: m.id.name.to_owned(),
+                    file: Some(file.clone()),
+                });
+            },
+            Entry::Term(_)
+            | Entry::Comment(_)
+            | Entry::GroupComment(_)
+            | Entry::ResourceComment(_)
+            | Entry::Junk { .. } => {
+                // these are not part of "public" API so do nothing
+                // comments linked to message are part of Message entry
+                // and we are not interested in global comments either, for now
+            },
+        }
+    }
+    keys
+}
+
+/// Grab keys from one language sitting at `from`.
+///
+/// Tree of files assumed to have only .ftl files.
+fn keys(from: &Path, tree: &Walk) -> Vec<MsgId> {
+    let mut keys = Vec::new();
+
+    tree.for_each_file(from, &mut |filepath| {
+        if !filepath.ends_with("_manifest.ron") {
+            keys.extend(keys_from_file(filepath));
+        }
+    });
+
+    keys
+}
+
+// TODO:
+// Add versioning
+// TODO:
+// Do something with attributes?
+//
+// For some messages it makes sense to require that all attributes
+// should match ones in reference language.
+// For some it doesn't as of now.
+#[derive(Clone, Debug)]
+pub struct MsgId {
+    pub key: String,
+    pub file: Option<String>,
+}
+
+// TODO:
+// Add versioning
+#[derive(Debug)]
+pub struct Stats {
+    pub up_to_date: Vec<MsgId>,
+    pub not_found: Vec<MsgId>,
+    pub unused: Vec<MsgId>,
+}
+
+pub struct ReferenceLanguage {
+    /// All keys.
+    pub keys: Vec<MsgId>,
+    /// Cached tree of files.
+    tree: Walk,
+}
+
+impl ReferenceLanguage {
+    /// Generate reference language, path should be absolute.
+    pub fn at(path: &Path) -> Self {
+        let tree = i18n_tree(path)
+            .unwrap_or_else(|e| panic!("{path:?}\nfailed to build file tree\n{e:?}"));
+        let keys = keys(path, &tree);
+        Self { keys, tree }
+    }
+
+    /// Compare with other language
+    pub fn compare_with(&self, lang: &Language) -> Stats {
+        let keys = keys(&lang.path, &self.tree);
+
+        let mut stats = Stats {
+            up_to_date: Vec::new(),
+            not_found: Vec::new(),
+            unused: Vec::new(),
+        };
+
+        for ref_key in &self.keys {
+            if let Some(key) = keys.iter().find(|MsgId { key, .. }| &ref_key.key == key) {
+                stats.up_to_date.push(key.clone());
+            } else {
+                stats.not_found.push(MsgId {
+                    key: ref_key.key.clone(),
+                    file: None,
+                });
+            }
+        }
+
+        for key in &keys {
+            if !self
+                .keys
+                .iter()
+                .any(|MsgId { key: ref_key, .. }| ref_key == &key.key)
+            {
+                stats.unused.push(key.clone())
+            }
+        }
+
+        stats
+    }
+}
+
+pub struct Language {
+    pub code: String,
+    pub path: PathBuf,
+}
diff --git a/voxygen/i18n/src/bin/i18n-check.rs b/voxygen/i18n/src/bin/i18n-check.rs
new file mode 100644
index 0000000000..002d76e9a2
--- /dev/null
+++ b/voxygen/i18n/src/bin/i18n-check.rs
@@ -0,0 +1,39 @@
+use clap::{Arg, Command};
+use common_assets::find_root;
+use veloren_voxygen_i18n::{
+    analysis::{Language, ReferenceLanguage},
+    REFERENCE_LANG,
+};
+
+fn main() {
+    let args = Command::new("i18n-check")
+        .about("Tool to check your Veloren localisation for correctness and missing keys")
+        .arg(
+            Arg::new("CODE")
+                .required(true)
+                .help("Run diagnostic for specific language code (de_DE, for example)"),
+        )
+        .get_matches();
+
+    let root = find_root().unwrap();
+    let i18n_directory = root.join("assets/voxygen/i18n");
+    let reference = ReferenceLanguage::at(&i18n_directory.join(REFERENCE_LANG));
+
+    let code = args.value_of("CODE").expect("arg is required");
+    let lang = Language {
+        code: code.to_owned(),
+        path: root.join(i18n_directory.join(code)),
+    };
+    let stats = reference.compare_with(&lang);
+    println!("\t[Not found]: {}", stats.not_found.len());
+    for key in stats.not_found {
+        let key = &key.key;
+        println!("{key}");
+    }
+
+    println!("\n\t[Unused]: {}", stats.unused.len());
+    for key in stats.unused {
+        let key = &key.key;
+        println!("{key}")
+    }
+}
diff --git a/voxygen/i18n/src/error.rs b/voxygen/i18n/src/error.rs
new file mode 100644
index 0000000000..99f47bada3
--- /dev/null
+++ b/voxygen/i18n/src/error.rs
@@ -0,0 +1,75 @@
+use fluent_syntax::parser::ParserError;
+use std::{error::Error, fmt, ops::Range};
+
+#[derive(Debug)]
+struct Pos {
+    line: usize,
+    character: usize,
+}
+
+impl fmt::Display for Pos {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{};{}", self.line, self.character)
+    }
+}
+
+fn unspan(src: &str, span: Range<usize>) -> Range<Pos> {
+    let count = |idx| {
+        let mut line = 1;
+        let mut character = 1;
+        for ch in src.bytes().take(idx) {
+            // Count characters
+            character += 1;
+
+            // Count newlines
+            if ch == b'\n' {
+                line += 1;
+                // If found new line, reset character count
+                character = 1;
+            }
+        }
+        Pos { line, character }
+    };
+    let Range { start, end } = span;
+    count(start)..count(end)
+}
+
+// TODO:
+// Ideally we wouldn't write this code, check this issue in fluent-rs.
+// https://github.com/projectfluent/fluent-rs/issues/176
+#[derive(Debug)]
+pub enum ResourceErr {
+    ParsingError {
+        #[allow(dead_code)] // false-positive
+        file: String,
+        #[allow(dead_code)] // false-positive
+        err: String,
+    },
+    BundleError(String),
+}
+
+impl ResourceErr {
+    pub fn parsing_error(errs: Vec<ParserError>, file: String, src: &str) -> Self {
+        let errs = errs
+            .into_iter()
+            .map(|e| {
+                let Range {
+                    start: from,
+                    end: to,
+                } = unspan(src, e.pos);
+                format!("{from}..{to}, kind {:?}", e.kind)
+            })
+            .collect::<Vec<_>>();
+
+        Self::ParsingError {
+            file,
+            err: format!("{errs:?}"),
+        }
+    }
+}
+
+impl fmt::Display for ResourceErr {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "{self:#?}") }
+}
+
+impl Error for ResourceErr {}
diff --git a/voxygen/i18n/src/lib.rs b/voxygen/i18n/src/lib.rs
index 1fff103e18..5c36c7eb6f 100644
--- a/voxygen/i18n/src/lib.rs
+++ b/voxygen/i18n/src/lib.rs
@@ -1,5 +1,11 @@
+mod error;
 mod raw;
 
+use error::ResourceErr;
+
+#[cfg(any(feature = "bin", feature = "stat"))]
+pub mod analysis;
+
 use fluent_bundle::{bundle::FluentBundle, FluentResource};
 use intl_memoizer::concurrent::IntlLangMemoizer;
 use unic_langid::LanguageIdentifier;
@@ -147,74 +153,10 @@ impl assets::Compound for Language {
 
             match cache.load(id) {
                 Ok(handle) => {
-                    use std::{error::Error, fmt, ops::Range};
-
-                    #[derive(Debug)]
-                    struct Pos {
-                        #[allow(dead_code)] // false-positive
-                        line: usize,
-                        #[allow(dead_code)] // false-positive
-                        character: usize,
-                    }
-
-                    fn unspan(src: &str, span: Range<usize>) -> Range<Pos> {
-                        let count = |idx| {
-                            let mut line = 1;
-                            let mut character = 1;
-                            for ch in src.bytes().take(idx) {
-                                // Count characters
-                                character += 1;
-
-                                // Count newlines
-                                if ch == b'\n' {
-                                    line += 1;
-                                    // If found new line, reset character count
-                                    character = 1;
-                                }
-                            }
-                            Pos { line, character }
-                        };
-                        let Range { start, end } = span;
-                        count(start)..count(end)
-                    }
-
-                    // TODO:
-                    // better error handling?
-                    #[derive(Debug)]
-                    enum ResourceErr {
-                        ParsingError {
-                            #[allow(dead_code)] // false-positive
-                            file: String,
-                            #[allow(dead_code)] // false-positive
-                            err: String,
-                        },
-                        BundleError(String),
-                    }
-
-                    impl fmt::Display for ResourceErr {
-                        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                            write!(f, "{self:?}")
-                        }
-                    }
-
-                    impl Error for ResourceErr {}
-
                     let source: &raw::Resource = &*handle.read();
                     let resource =
                         FluentResource::try_new(source.src.clone()).map_err(|(_ast, errs)| {
-                            let file = id.to_owned();
-                            let errs = errs
-                                .into_iter()
-                                .map(|e| {
-                                    let pos = unspan(&source.src, e.pos);
-                                    format!("{pos:?}, kind {:?}", e.kind)
-                                })
-                                .collect::<Vec<_>>();
-
-                            ResourceErr::ParsingError {
-                                file,
-                                err: format!("{errs:?}"),
-                            }
+                            ResourceErr::parsing_error(errs, id.to_owned(), &source.src)
                         })?;
 
                     bundle
@@ -505,14 +447,15 @@ mod tests {
 
     #[test]
     #[ignore]
+    #[cfg(feature = "stat")]
     // Generate translation stats
     fn test_all_localizations() {
-        // FIXME (i18n translation stats):
-        use std::{fs, io::Write};
+        use analysis::{Language, ReferenceLanguage};
+        use assets::find_root;
+        use std::{fs, io::Write, path::Path};
 
-        let output = assets::find_root()
-            .unwrap()
-            .join("translation_analysis.csv");
+        let root = find_root().unwrap();
+        let output = root.join("translation_analysis.csv");
         let mut f = fs::File::create(output).expect("couldn't write csv file");
 
         writeln!(
@@ -520,5 +463,46 @@ mod tests {
             "country_code,file_name,translation_key,status,git_commit"
         )
         .unwrap();
+
+        let i18n_directory = root.join("assets/voxygen/i18n");
+        let reference = ReferenceLanguage::at(&i18n_directory.join(REFERENCE_LANG));
+
+        let list = list_localizations();
+        let file = |filename: Option<String>| {
+            let file = filename
+                .as_ref()
+                .map(|s| Path::new(s))
+                .and_then(|p| p.file_name())
+                .and_then(|s| s.to_str())
+                .unwrap_or("None");
+
+            format!("{file}")
+        };
+        for meta in list {
+            let code = meta.language_identifier;
+            let lang = Language {
+                code: code.clone(),
+                path: i18n_directory.join(code.clone()),
+            };
+            let stats = reference.compare_with(&lang);
+            for key in stats.up_to_date {
+                let code = &code;
+                let filename = &file(key.file);
+                let key = &key.key;
+                writeln!(f, "{code},{filename},{key},UpToDate,None").unwrap();
+            }
+            for key in stats.not_found {
+                let code = &code;
+                let filename = &file(key.file);
+                let key = &key.key;
+                writeln!(f, "{code},{filename},{key},NotFound,None").unwrap();
+            }
+            for key in stats.unused {
+                let code = &code;
+                let filename = &file(key.file);
+                let key = &key.key;
+                writeln!(f, "{code},{filename},{key},Unused,None").unwrap();
+            }
+        }
     }
 }