diff --git a/backend/src/controllers/themes.ts b/backend/src/controllers/themes.ts
index 442eb982..73091dd7 100644
--- a/backend/src/controllers/themes.ts
+++ b/backend/src/controllers/themes.ts
@@ -10,9 +10,6 @@ interface Translations {
     };
 }
 
-/**
- * Laadt de vertalingen uit een YAML-bestand
- */
 function loadTranslations(language: string): Translations {
     try {
         const filePath = path.join(process.cwd(), '_i18n', `${language}.yml`);
@@ -20,7 +17,7 @@ function loadTranslations(language: string): Translations {
         return yaml.load(yamlFile) as Translations;
     } catch (error) {
         console.error(
-            `Kan vertaling niet laden voor ${language}, fallback naar Nederlands`
+            `Cant load for language: ${language}, fallen back on dutch`
         );
         console.error(error);
         const fallbackPath = path.join(process.cwd(), '_i18n', 'nl.yml');
@@ -28,9 +25,7 @@ function loadTranslations(language: string): Translations {
     }
 }
 
-/**
- * GET /themes → Haalt de lijst met thema's op inclusief vertalingen
- */
+
 export function getThemes(req: Request, res: Response) {
     const language = (req.query.language as string)?.toLowerCase() || 'nl';
     const translations = loadTranslations(language);
@@ -48,9 +43,7 @@ export function getThemes(req: Request, res: Response) {
     res.json(themeList);
 }
 
-/**
- * GET /themes/:theme → Geeft de HRUIDs terug voor een specifiek thema
- */
+
 export function getThemeByTitle(req: Request, res: Response) {
     const themeKey = req.params.theme;
     const theme = themes.find((t) => {
@@ -60,6 +53,6 @@ export function getThemeByTitle(req: Request, res: Response) {
     if (theme) {
         res.json(theme.hruids);
     } else {
-        res.status(404).json({ error: 'Thema niet gevonden' });
+        res.status(404).json({ error: 'Theme not found' });
     }
 }
diff --git a/backend/src/routes/themes.ts b/backend/src/routes/themes.ts
index 3185640e..434ee687 100644
--- a/backend/src/routes/themes.ts
+++ b/backend/src/routes/themes.ts
@@ -3,7 +3,12 @@ import { getThemes, getThemeByTitle } from '../controllers/themes.js';
 
 const router = express.Router();
 
+// query: language
+//  Route to fetch list of {key, title, description, image} themes in their respective language
 router.get('/', getThemes);
+
+// arg: theme (key)
+//  Route to fetch list of hruids based on theme
 router.get('/:theme', getThemeByTitle);
 
 export default router;