In my research online, I have found a truism that CV is [the most basic syllable type cross-linguistically](https://typo.uni-konstanz.de/archive/nav/browse.php?number=687), and is in fact [present in all languages](http://www.linguisticsnetwork.com/the-basics-on-syllabic-structure/). Other syllable types are not present in all languages. This raises the question: is there any language that uses *only* CV syllables?

I thought I had found my answer from the [World Atlas of Language Structures](http://wals.info/chapter/12), which states:

> In a relatively small number of languages this [CV] is the only type of syllable permitted. Such languages include Hawaiian and Mba (Adamawa-Ubangian, Niger-Congo; Democratic Republic of Congo).

However, [Wikipedia's article on Hawaiian phonology](https://en.wikipedia.org/wiki/Hawaiian_phonology#Phonotactics) contradicts the claim that Hawaiian is strictly CV. It describes Hawaiian syllables as (C)V(V), and provides the following example: "/alo/ ('front') contrasts with /ʔalo/ ('to dodge')." It's clear that the first syllable of /alo/ is V, not CV.

Finding online information about [Mba](https://en.wikipedia.org/wiki/Mba_language) was harder, but here's a [word list](https://ia800300.us.archive.org/28/items/rosettaproject_mfc_swadesh-1/mfc.txt). It's possible that the transcription is incorrect or ignores glottal stops, but it certainly looks like plenty of words have V or CVV syllables: for example `núbebea`, `bia`, and even `u`.

In another language, [Mamara/Minyanka](https://en.wikipedia.org/wiki/Minyanka_language), most of [the words starting with 'a'](http://www.malien.net/mamara/lexique/lexicon/main.htm) seem to be borrowings from European languages, but a couple seem to be native words beginning with V syllables: `aa`, `ahayi`.

So: are there actually any languages in which *all* syllables are CV, without any V, CVV, or other types?

*Note: I'm particularly interested in languages that don't have diphthongs, as those could be considered sequences of two vowels or a vowel and a glide. However, I will also accept languages that are strictly CV where the V can include diphthongs.*