Ćwarmin, Sargaĺk, Bryatesle, Dairwueh, Ŋʒädär: Verbs for Speaking Foreign Languages and Babbling

The main approach to forming words for 'babbling' is using a syllable that sounds inherently nonsensical, often with some measure of reduplication:

English: babble
Georgian ლუღლუღი ‎(luɣluɣi), ბუტბუტი (buṭbuṭi)
Greek: βάρβαρος (barbaros)

Note that 'barbaros' basically meant 'someone who speaks incoherently' or somesuch. Similar words can be found in Bryatesle and Dairwueh:

Bryatesle:

klaklan (type II verb)
klaklasi (noun, masculine, 'babbler', 'barbarian')
klaklara (noun, feminine, 'babbler', 'barbarian')
klakyli (noun, masculine, 'babble')

Dairwueh:

xrəxlə- (verb, 'babble')
xrəxlaŋo (noun, masculine, 'babbler', 'barbarian')
xrəxli (noun, feminine, 'babbler', 'barbarian')
xrəxle (noun, neuter, 'babble')

Being less culturally dominant, Ćwarmin, Ŋʒädär and Sargaĺk do not associate speaking a different language with being a barbarian. Klaklas has been borrowed into Ćwarmin as a word for barbarian. 

The Ćwarmin word for babbling (and also speaking foreign languages) is the verb dindin, and similarly Ŋʒädär has the verb vörvör. Both are formed by reduplication of some slightly 'nonsensical-sounding' syllable. In Ŋʒädär, this verb is especially interesting since it is the usual verb for describing the ability of speaking a foreign language:

saɤ brıətəs-rık vörvör-dü*-s
I-abs bryatesle-instr speak_foreign-POT*-1sg_intr
I (can) speak (in) Bryatesle

* this morpheme isn't, strictly speaking, a potential marker throughout the verbal system; the TAM&c system in Ŋʒädär is fairly complicated, with different markers acquiring different meanings in different combinations and with different verbs.

Vörvör can be made transitive - the object then is whoever one speaks to. In the intransitive with a language as instrumental it is seldom used without the potential mood, although it is possible to just omit the potential marker. If the instrumental argument is missing, it just means 'babble'.

Ćwarmin does not have a similar use for dindin - it merely signifies babble or speak an incomprehensible language. Ćwarmin therefore uses the regular verb for 'to speak' when discussing particular linguistic competences, with the language in the instrumental.

Sargaĺk has unique verbs for each of their close neighbours' languages:

tvemarej - to speak Bryatesle (from Bryatesle tvem, 'you')
becarej - to speak Ćwarmin (from Ćwarmin bec, 'you')
soŋarej - to speak Lamen (from Lamen sõq, a very common particle)
erbarej - to speak Dairwueh (from Dairwueh erb-, 'to be')

The Sargaĺk have such verbs for three other minor languages of the area. For general babbling, Sargaĺk has sormoj, which is unusual in not having any reduplication in it.