In linguistics, vehicular language refers to a language that is used as a mere vehicle or aid for an extra- linguistic concern. This almost always applies to language, but what is meant is not the non-meta-lingual use of one's own language, but the specific use of a second language , for example in addition to the mother tongue .
Often the concept of vehicle language coincides with that of umbrella language . As a common standard language , it “rethinks” the language areas of individual, indigenous vernacular languages and thus serves above all for supraregional communication . The foreign language to be acquired in bilingual lessons is also a vehicle language in a certain sense, insofar as it is primarily a vehicle for conveying the specific teaching programs and specialist curricula in the non-lingual subjects . Regardless of this, the concept of bilingual teaching naturally serves to improve the acquisition of a foreign language.