The History of Yambúrz
Yambúrz began as a dialect of MERP with Shadowlandian influence. Specifically, it took words from the Angelfire and Land of Shadows websites. At this time it had basically English grammar with no real uniqueness (it was here when the suffix -ıj was created). Here are some examples of sentences of that era:
Izg-zik dúr shurûk, izg-urdanur khotim, asu iz-ur kîbum, gûm, mûbum. Izg-hiz-ûk votarur.... (I could not find a word-for-word translation but it means something like: I am the master over all. I command. They obey my word. Worlds fall. I control all.)
Athârzafulûn-árûrz quînubat burzum-ul, daghbúrz-ul (this is easier to translate. Arda-unknown bow [confusing the Shadowlandian word for a bow with the verb bow] darkness-them, Mordor-them. Why -ul (them) was used for to (-at) is unknown)
Aa you can see, this dialect (we will call Flas Daghbúrz-ob, which was its endonym) was simply a creole of MERP, Shadowlandian, and David Salo.
The second stage of Yambúrz evolution was Burzgîjab. Here it was influenced by Shadowlandian and Svartiska the most. This is when the majority of the corpus of words was developed. During this time, the tenses were fully developed. Some grammar was actually developed: "Mildly agglutinative. Follows SOV order and SVO order depending on the context. Uses hyphens to agglutinate."
The third stage was called Yambûrz. It was the last step before the modern form. Here it was heavily influenced by Salo's work, Horngoth, and Mugbûrz. This is basically the same as the second stage grammatically but has many, many conflicting synonyms and is extremely contradictory. During this time, the pronoun system was created.
The modern form is heavily influenced by Zhâburi B grammatically. The entire grammar system was replaced by an ergative-absolutive system decended from the Zhâburi system. It adopted suffixaufnahme from Hurrian, exclamation framing from Ancient Greek, Hurrian e-case (with modifications), the allocutive case from Basque (with the suffixes originating in Ancient Adûnaic), a flexible OSV order from Hurrian, a translative-factitive case from Hungarian and Finnish, the abassive case from Finnish and Estonian, the morphology in the vocative case from Czech, definite conjugation from Hungarian, indefinite article grammaticalization from German, clitic copula from Neo-Aramaic, name polysynthesis from Valarin and Inuktitut, adjective placement rules from Tolkien's Black Speech with Romance influence, collective plural -il influenced by Persian -ān, dual pair plurals from Czech, collective pronouns from Malayalam, T–V distinction from Spanish (tú vs usted) and Latin (tu vs vos), indefinite pronouns from Latin, dual pronouns from Old English, "sha," with, system from Latin "cum," sandhi from Sanskrit, vowel elision from Finnish, gemination from Italian, grammaticalized phonology from Navajo, and the system of three grammatical standards from Nynorsk vs Boksmål in Norwegian.