After asking in the telegram app dev group I found out that the error was caused by not specifying the property applicationName inside of the MainView. Because of that the gettext domain was set to an empty string, which prevented the translations from getting loaded.

@lduboeuf That does work, thanks for the tip. I totally overlooked the cmake builder in the clickable docs but now it makes sense. I just added an extra step to use the right binary before building, but now I can specify for what architecture I want to build the click