All my apps are in a weird language

Hello Niramifksa and welcome to Apple Support Communities.

I see you are having an issue with how languages are appearing in the App Store on your iPhone.

The language for the App Store is determined by what region is associated with your Apple ID and iTunes/App Store account.

Change your Apple ID country or region - Apple Support

Cheers.

Hi Niramifksa.

In looking at the screen shots, it appears that the App Store itself is appearing in Swedish as expected and that the language issue may be confined to a couple of downloaded apps. Is that the case? In other words, is this issue with language affecting all apps (including the ones like Mail and Notes that came with the device) or is it limited to certain third-party apps that you have downloaded in the past?

If this is happening only with certain apps, first make sure there are not updates to any of those apps in the App Store. If there are not, consider removing the app from the device and reinstalling it.

Redownload apps, music, movies, TV shows, and books - Apple Support

If the behavior is confined to a few apps and reinstallation does not resolve the issue, you'll want to work directly with the apps' developers on this issue.

How to contact an app developer - Apple Support

Cheers.

Please post a screenshot showing the "weird language" you are talking about.