Modern Aquitanian
Modern Aquitanian (xa'Akitee /saʔaki'tɛ̃/) is spoken in western France in Lõis, and despite the name, it's a language isolate unrelated to Basque. Its phonology and grammar shaped the evolution of Modern Standard French.
History
The origins of Modern Aquitanian are shrouded in mystery; it's a common belief among non-linguists that Modern Aquitanian is a remnant of the earliest languages spoken in Europe, before the Indo-European invasion.
Todo
Relex polysynthetic analyses of French