Not one of these, but I tried on a small, Lithuanian, language. The catch is what the language has complicated grammar, but not as bad as Finnish, Estonian and Hungarian. I asked to summarise some text and it does the job, but the grammar is not perfect and in some cases, at a foreigner level. Plus, it invented some words with no meaning. E.g. `„Sveika gyvensena“ turi būti *atnemitinamas* viso kurso *vykišioje*.`