Moselle Franconian (German: Moselfränkisch; Luxembourgish: Muselfränkesch) is a West Central German language, part of the Central Franconian languages area, that includes Luxembourgish.

Moselle Franconian is spoken in the southern Rhineland and along the course of the Moselle, in the Siegerland of North Rhine-Westphalia, throughout western Rhineland-Palatinate and Saarland, Luxembourg, the south of the German-speaking Community of Belgium and in the neighboring French département of Moselle (in Arrondissement of Boulay-Moselle).

Another variety of Moselle Franconian, the Hunsrik, is spoken in some rural areas of southern Brazil, brought by 19th century immigrants from the Hunsrück region in modern Germany.

[3] The Linguasphere Register[4] lists five dialects of Moselle Franconian (code 52-ACB-dc) with codes -dca to -dce: Also considered part of the Moselle Franconian language are the variants of Lorraine Franconian, Luxembourgish[5][6] and Transylvanian Saxon dialect.

Some Moselle Franconian dialects have developed into standardized varieties which can be considered separate languages, especially due to the limited intelligibility of some dialects for Standard German speakers: Most speakers of Luxembourgish are multilingual, speaking Standard German and French in addition to Luxembourgish.