I have made some research and I have some updates:

$english_name = 'Tarifit';       // https://en.wikipedia.org/wiki/Tarifit
$native_name = 'Tmaziɣt';        // https://dbpedia.org/page/Tarifit https://en.wikipedia.org/wiki/Tarifit
$text_direction = 'ltr';         // Latin, Arabic script, Tifinagh https://en.wikipedia.org/wiki/Tarifit
$lang_code_iso_639_1 = null;
$lang_code_iso_639_2 = null;
$lang_code_iso_639_3 = 'rif';    // https://iso639-3.sil.org/code/rif
$country_code = 'ma';            // https://www.iso.org/obp/ui/#iso:code:3166:MA
$wp_locale;                      // This should only be set for locales that are offically supported on translate.wordpress.org.
$slug = 'rif';                   // https://iso639-3.sil.org/code/rif
$nplurals = 2;                   // https://translations.launchpad.net/+languages/rif
$plural_expression = 'n != 1';   // https://translations.launchpad.net/+languages/rif
$google_code = null;
$preferred_sans_serif_font_family = null;
$facebook_locale = null;
$alphabet = 'latin';             // Latin, Arabic script, Tifinagh https://en.wikipedia.org/wiki/Tarifit
$word_count_type = 'words';

Tmaziɣt or Tamaziɣt is Berber. And many languages which are derived from Berber call the language Tmaziɣt. Riffian call Tarifit tmaziɣt and others too call their language Tmaziɣt/Tamaziɣt. However we have native names of every language beside Tmaziɣt.
I believe as Riffian we use Tarifiyt as native name.
$english_name = 'Tarifit'; $native_name = 'Tarifiyt';
or even we use Riffian as English name:
$english_name = 'Riffian'; $native_name = 'Tarifit';
https://en.wikipedia.org/wiki/Berber_languages
https://en.wikipedia.org/wiki/Central_Atlas_Tamazight

English name

I think the name is "Tarifit". We have this name in:

• Wikipedia: https://en.wikipedia.org/wiki/Tarifit
• ISO 639-3 page: https://iso639-3.sil.org/code/rif
• Ethnologue: https://www.ethnologue.com/language/rif

Native name

I used "Tmaziɣt" because the Wikipedia uses this name between parentheses, and they usually use the parentheses for the native name. I saw this pattern with my two mother languages:

• Galego: https://en.wikipedia.org/wiki/Galician_language
• Español: https://en.wikipedia.org/wiki/Spanish_language

and with other languages:

• https://en.wikipedia.org/wiki/Portuguese_language
• https://en.wikipedia.org/wiki/French_language

I understand that you have checked Wikipedia and you are trying to get the most truthfulness information you can have. as I'm trying too to explain to you why Tmaziɣt is not the most accurate word here.

1. Tmaziɣt and Tamaziɣt are the same term in different grammatical case.
2. Tamaziɣt is used to refer to Berber language. which is the mother language of all sub-Berber languages.
3. Imazighen is the term that is used to refer to the Berber people, who are an indigenous ethnic group that lives in North Africa.
4. Imazighen refer to their language as Tamaziɣt for a number of reasons.
5. Tamaziɣt is the term that has been traditionally used to refer to the Berber language.

The term "Tamaziɣt" refers to the Imaziɣen's language when speaking with non-Berber speakers. Among Berber speakers, "Tamaziɣt" specifically refers to Central Atlas Tamazight (tzm). However, Specific sub-Berber language speakers (Tarifit speakers for example) also use the term "Tamaziɣt" to refer to their own language. It is also believed that the native name for the Tarifit language is "Tarifiyt".

https://web.archive.org/web/20120628211208/http://wold.livingsources.org/language/6

@ipshel Following your comments, I have updated the native name. I think it is ok to be merged. Is it ok to you?

@amieiro Everything is ok.
Thank you. I appreciate that.

@amieiro Everything is ok. Thank you. I appreciate that.

@ipshel Thank you for your time. Sorry for so much change. I just wanted to be sure that the correct information was added to the project.