Goblin languages

Proto-Goblin
The Proto-Goblin language only had 5 vowel phonemes /a e i o u/, 12 dipthongs /ai̯ au̯ ei̯ eu̯ oi̯ ou̯ ui̯ iu̯ ie̯ uo̯ ia̯ ua̯/ and 14 consonant phonemes /m b n t d s l ɾ r ɕ j k g w/, no vowel length distintion, no gemination, no tones, with the following details: Not all of the consonants could appear in all positions:
 * /e o/ were true mid [e̞ o̞]
 * /t d l s/ were either lamino-alveolar [t̻ d̻ l̻ s̻] or denti-alveolar [t̪ d̪ l̪ s̪]
 * /ɾ r/ were apico-alveolar [ɾ̺ r̺]. /r/ could have also been possibly uvular [ʀ]
 * /ɕ/ was alveolo-palatal [ɕ]
 * /r/ can only appear between two vowels in native vocabulary. It can also appear word-initially in loanwords.
 * /ɾ/ can appear in all positions, except word-initially. Not even in loanwords can it appear word-initially.
 * Word-initial consonant clusters were not tolerated.
 * Vowel clusters are not tolerated, and are broken up by an epenthetic /ɾ/ in loanwords. The only exceptions are clusters that start with or end with /i/ or /u/, which were converted into diphthongs.

Koblin †
Spoken formerly in what is now Artaburro, the language is virtually extinct, as the Artaburran Goblins were marginalized to the point of near-extinction, the remnant expelled into lands that cannot support large populations.
 * At first, the proto-Goblin /l/ and /ɾ/ merged as a new phoneme /ɺ/, while /r/ remained untouched. /g/ also softened to /ɣ/.
 * The original proto-Goblin diphthongs /ai̯ au̯ ei̯ ou̯ ie̯ uo̯ ia̯ ua̯/ became /ɛː ɔː eː oː iː uː jɛ wɔ/, while /oi̯ eu̯ ui̯ iu̯/ remained untouched
 * Some time around or before the proto-Elven colonization of Artograch (2500-2000 BEKE) /ɺ/ shifted to /l/, /r/ became /ɾ/, /ɣ/ became /ɦ/. Simultaneously, /t/ became [tʰ], /d/ became [d̥~d], /b/ became [b̥~b], /k/ became [g̊~g].
 * During the last centuries of the language's virtual existence, short /i u/ became [ɪ ʊ] and the formerly established vowel length distinctions were lost, resulting in a vowel inventory of /a ɛ e ɪ i ɔ o ʊ u/
 * Around 270 AEKE, the langauge went virtually extinct. What remained of the survival speakers was expelled into inhospitable territory. If the descendants of the survivors still linger on, the number of speakers of this language may be in a few hundreds instead of zero.

Kobold
Spoken in Brutang, this language continues to thrive. Nearly all native speakers are bilingual in the Orcish language.
 * The original /r/ became [ʁ], while /ɾ/ remained untouched, pronounced as [ɾ].
 * The original diphthongs /ui̯ iu̯ ie̯ uo̯ ia̯ ua̯/ became /wi ju je wo ja wu/.
 * /kw kj gw gj/ coalesce into new labio-velar and palato-velar sounds [kʷ kʲ gʷ gʲ]. The palato-velar [kʲ gʲ] eventually evolve into [t͡ɕ d͡ʑ]
 * Loanwords from Orcish introduced /p/ into the language
 * At one point, the voiceless stops /p t t͡ɕ k kʷ/ became aspirated [pʰ tʰ t͡ɕʰ kʰ kʷʰ].
 * Unlike in Orcish, the voiced stops never lost their voicing, remaining fully voiced in all environments.

Geldorn
Spoken in Keldorn.
 * The original diphthongs /ai̯ au̯ ei̯ eu̯ oi̯ ou̯ ui̯ iu̯ ie̯ uo̯ ia̯ ua̯/ become /ɛː ɔː eː øː øː oː yː yː eː oː ɛː ɔː/
 * The vowel length distinctions are lost later on, temporarily resulting in a 9-vowel system /a ɛ e i ɔ o u ø y/
 * This 9-vowel system is broken up later, by breaking /e o ø y/ into /jɛ wɔ jo ju/. This results in a five-vowel system /a ɛ i ɔ u/.
 * The original voiced stops become /b d g/ become voiceless [p t k], while the original voiceless /t k/ became [tʰ kʰ]. The aspirated stops become strongly aspirated, while the unaspirated ones gain a slight aspiration.