احسن الله إليكم I am currently living in the west and I want to make hijrah to my country of origin. I thought of teaching german as a source of income but I'm afraid that people would want to learn it in order to leave our muslim country and come to the west. Would I be sinful for teaching them?

Ustadh AbdulAziz al-Haqqan

Teaching it is allowed. Learning a language is permissible in itself, and Shaykh Ibn Baz raḥimahullāh said a permissible thing is withheld only from the one you know, or strongly think, will use it in what Allah forbade.