[Plugin: TDO Mini Forms] tdomf in different languages

Hello! TDO Mini forms is a wonderful tool. I just have a big problem to get it running properly in different languages:
The site https://www.ecoguia-espana.es is running in spanish and germanm using wpml.
TDOMF is working fine in the default language. But as soon as someone tries to use it in the other language, the new post is anyway added in the default language.
I am looking for a solution since two weeks, but couldn’t come up with any. I’d appreciate very much any tipps, insights or thoughts concerning this issue. thx a lot in advance, connie