Yes, Tonga and Tongan refer to the same language. Tongan is the official language of Tonga and is spoken by \approx imately 120,000 people worldwide. It is a Polynesian language and shares similarities with other Polynesian languages such as Samoan and Maori. The term Tonga can sometimes refer to the people of Tonga, but in the context of language, it refers to the Tongan language.
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