Languages of the European Union languages, Latvian and Lithuanian; the Celtic languages, including Irish; and Greek are also Indo-European. Outside the Indo-European family, Estonian, Finnish, and Hungarian are Uralic languages while Maltese is the only Afroasiatic language with official status in the EU. The Basque language, a language isolate whose roots are unknown, is an official language in some parts of northern Spain, but not an official language of the EU. Most official EU languages are written in the Latin script. The two exceptions are Greek, which is written in the Greek script, and Bulgarian, which is written in Cyrillic script. With the accession of
Indo-Uralic languages vocabulary common to Indo-European and Uralic remains. As examples they advance such comparisons as Proto-Uralic *' (or *') : Proto-Indo-European *', oblique stem *', both meaning 'water', and Proto-Uralic *' (or *') : Proto-Indo-European *', both meaning 'name'. In contrast to *' and *', the phonology of these words shows no sound changes from Indo-European daughter languages such as Indo-Iranian. In contrast to *' and *"", they show no morphological affixes from Indo-European that are absent in Uralic. According to advocates of the Indo-Uralic hypothesis, the resulting core of common vocabulary can only be explained by the hypothesis of common