Added Japanese, Spanish (Mexico) as languages and fixed the non displaying Subscribe translation

src/renderer/components/watch-video-info/watch-video-info.js

@@ -100,7 +100,7 @@ export default Vue.extend({
     },
 
     subscribedText: function () {
-      return `${this.$t('Subscribe').toUpperCase()} ${this.subscriptionCountText}`
+      return `${this.$t('Channel.Subscribe').toUpperCase()} ${this.subscriptionCountText}`
     },
 
     dateString() {

src/renderer/main.js

@@ -23,7 +23,7 @@ Vue.component('font-awesome-icon', FontAwesomeIcon)
 Vue.use(VueI18n)
 
 // List of locales approved for use
-const activeLocales = ['en-US', 'de-DE', 'fi', 'fr-FR', 'pt-BR', 'pt-PT', 'ru', 'vi', 'zh-CN', 'zh-TW']
+const activeLocales = ['en-US', 'de-DE', 'es-MX', 'fi', 'fr-FR', 'ja', 'pt-BR', 'pt-PT', 'ru', 'vi', 'zh-CN', 'zh-TW']
 const messages = {}
 
 // Take active locales and load respective YAML file