diff --git a/src/utils/client.ts b/src/utils/client.ts
index fd501ee..b3e159e 100644
--- a/src/utils/client.ts
+++ b/src/utils/client.ts
@@ -43,7 +43,8 @@ export default async () => {
 
 	client.commands = new Collection();
 
-	client.locales = await loadLocales();
+	console.log('Localizations progression :');
+	client.locales = await loadLocales(client.config.default_lang);
 
 	return client;
 };
diff --git a/src/utils/locales.ts b/src/utils/locales.ts
index d1ab8e8..52818a7 100644
--- a/src/utils/locales.ts
+++ b/src/utils/locales.ts
@@ -3,9 +3,11 @@ import { readdir } from 'fs/promises';
 import { removeExtension } from './misc';
 
 /**
- * Load the localizations files
+ * Load the localizations files into memory
+ * @param default_lang default lang
+ * @returns Map of map with all the localizations
  */
-export const loadLocales = async () => {
+export const loadLocales = async (default_lang: string) => {
 	const old_path = __dirname.split('/');
 	old_path.pop();
 
@@ -34,7 +36,7 @@ export const loadLocales = async () => {
 	);
 
 	// Check locales sanity
-	checkLocales(locales);
+	checkLocales(locales, default_lang);
 
 	return locales;
 };
@@ -81,14 +83,65 @@ export const getLocale = (client: Client, lang: string) => {
 };
 
 /**
- * Check if locales are sane
- * WARN if translation aren't 100%
- * ERROR if default lang isn't 100%
+ * Show percentage of translation progression
+ *
+ * Raise an error if the default lang isn't
+ * the lang with most text
  * @param locales Locales loaded
+ * @param default_lang default lang
  * @returns void
  */
-export const checkLocales = async (locales: Map<string, Map<string, string>>) => {
-	console.log(locales);
+export const checkLocales =
+async (locales: Map<string, Map<string, string>>, default_lang: string) => {
+	// Associate each lang with the number of locale it has
+	let locales_size = new Map<string, number>();
+	locales.forEach((locales_data, lang) => {
+		locales_size.set(lang, locales_data.size);
+	});
 
-	return;
+	// Sort the map
+	locales_size = new Map([...locales_size.entries()]
+		.sort((a, b) => b[1] - a[1]));
+
+	// Check if default lang is 100%
+	const [max_size_name] = locales_size.keys();
+	const [max_size] = locales_size.values();
+	const default_lang_size = locales_size.get(default_lang) ?? 0;
+	if (max_size > default_lang_size) {
+		throw new Error(
+			`The default locale (${default_lang} = ${default_lang_size}) isn't complete `
+			+ `(${max_size_name} = ${max_size}).`
+		);
+	}
+
+	// Remove the default language as it is used as a reference
+	locales_size.delete(default_lang);
+
+	// Displays the percentages according to the default language
+	// lower is bigger
+	const bar_size = 4;
+	locales_size.forEach((size, lang) => {
+		const percentage = (size / max_size) * 100;
+		const blocks = ' '.repeat(percentage / bar_size);
+		const blank = ' '.repeat((100 - percentage) / bar_size);
+		const color = () => {
+			switch (true) {
+				case percentage <= 25:
+					// red
+					return '\x1b[41m';
+				case percentage <= 50:
+					// mangeta
+					return '\x1b[45m';
+				case percentage <= 75:
+					// cyan
+					return '\x1b[46m';
+				case percentage <= 100:
+					// green
+					return '\x1b[42m';
+				default:
+					return '';
+			}
+		};
+		console.log(`${lang} | ${color()}${blocks}\x1b[0m${blank} | ${percentage}%`);
+	});
 };