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In page Portuguese language:

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Portuguese can have as many as 9 oral vowels, as many as 2 semivowels, and as many as 21 consonants; some varieties of the language have fewer phonemes. There are also five nasal vowels, which some linguists regard as allophones of oral vowels.[citation needed] Galician-Portuguese developed in the region of the former Roman province of Gallaecia, from the Vulgar Latin (common Latin) that had been introduced by Roman soldiers, colonists and magistrates during the time of the Roman Empire. Although the process may have been slower than in other regions, after a period of bilingualism, the centuries of contact with Vulgar Latin completely extinguished the native languages, and a variety of Latin with a few Gallaecian features evolved.[3][4]