Minecraft version & Mod Version:
MC 1.14.4 Forge 28.1.111

Cannot search in German for this version.
SimpleStorageNetwork-1.14.4-0.2.0.jar

I have to search for the English words through JEI
Can I change it somewhere? Config?

Thanks

1.14.4 has been retired, issue resolved in 1.16.5+

Can you send some screenshots or examples? I think if normal names are translated such as "dirt" in german you should be able to search for translations

I think the interface currently searches by item ID, not item name. For instance, I have to type kabel instead of cable to search for cables (I play in English), because the various cables have the word spelt as kabel in their item IDs.