Languages used in multilingual ecologies tend to be influenced. Depending on the nature of the contact the influence may be from a dominant regional language to another. The effects of such contact can lead to language shift, thereby impacting the intergenerational transmission or it could be in terms of language structure and culture leading to a homogenization of the languages, and reducing typological characteristics of the influenced language. In this talk I explore the contact-induced changes that have occurred in Ghana-Togo Mountain (GTM) languages. GTM languages, as the name suggests, are spoken along the mountain ranges along the Ghana-Togo border in West Africa. GTM speakers have one GTM language and at least one dominant regional language. I demonstrate from my documentation work how Ewe a (New) Kwa language spoken in Ghana, Togo and Benin has influenced the southern GTM languages phonologically, morpho-syntactically and semantically.