| 41. | There are several other small families and language isolates, as well as languages that have yet to be classified.
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| 42. | It is considered a language isolate, as it has not been proven to be related to any other language.
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| 43. | Language isolates may be seen as a special case of unclassified languages that remain unclassified even after extensive efforts.
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| 44. | These indigenous languages consist of dozens of distinct language families as well as many language isolates and unclassified languages.
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| 45. | The Hittite language was a distinct member of the language isolate but may have been a Northwest Caucasian language.
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| 46. | :There are many language isolates.
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| 47. | Presently there is a debate where these are language isolates, or if Japanese and Korean constitute a language family.
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| 48. | Sape is one of the most poorly attested extant languages in South America, and may be a language isolate.
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| 49. | Once thought to be a language isolate, Klamath Modoc is now considered a member of the Plateau Penutian language family.
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| 50. | The Natchez spoke a language isolate not related to the Muskogean languages of the other major tribes in the area.
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