Etëran Iopon (1 ene 970 año – 1 ene 1300 año)

Descripción:

Sound changes between Low Iopon and Eteran Iopon:
Final Vowel erosion completes
Masculine -a, feminine -ea, neuter -o endings vanish completely

Stress-driven vowel reduction and merger
Unstressed vowels reduce to central /ə/ or disappear entirely
/e/ and /i/ merge in unstressed syllebes > /i/; /o/ and /u/ merge into > /u/
Exe. /bevʲos/ > /bevʲus/

Complete Diphthong collapse
All surviving dipthongs resolve into monophthongs
/ɑɪ̯/ > /ɛ/, /eɪ̯/ > /i/, /oɪ̯/ > /e/, /ɑ̯u/ > /o/
Exe. Low /bɑɪ̯os/ > /bɛs/

New palatalization cycles
/k, g/ before /e, i/ > /ʧ, ʤ/
/t/ before /j/ > /ʧ/; /d/ before /j/ > /ʤ/

Voicing shifts in fricatives
Intervocalic /θ/ > /ð/ in all contexts; later /ð/ > /d/ in many words
Intervocalic /s/ > /z/ in most dialects (Minus the Thesian Dialect)
Exe. To cook = Low /θes/ > /θez/

Cluster simplification and regressive assimilation
/st/ > /s/ or /ʃ/ in casual speech, formal speech retains /st/
/nd/ > /n/, /mb/ > /m/, /ᵑg/ > /ŋ/
Exe. Low /ɑnst/ > /ɑns|anʃ/ or /ɑⁿʦ/

Geminate development from assimilation
New geminates arise when consonant loss creates compensatory length
Exe. Land = Low /pʲetə/ > /pʲetː/ > /pʲeʧ/

Prosodic smoothing
Speech rhythm shifts towards (strong-weak) patterns, leading to syncope of medial unstressed syllables
Exe. Low /benʲɑɾt/ > /bɛnə̆ɾt/

Morphological trends
Nouns: Declensions gone; relationships fully marked by preopositions
Gender: Still present in pronouns and adjectives; but sometimes in low frequency words
Verbs: person agreement erodes; auxiliaries dominate tense/aspect; old synthetic forms survive in high-frequency verbs (to be and to go)
Articles: Still no articles (similar to Oipientian)

City name shifts:
Cl. /tʰeɪ̯se̯ɑ/ > High /θesə/ > Low /θes/ > Eteran /ðes/
Pĩyerèt: Cl. /bɛni̯ɑɾetɑ/ > High /benjaɾət/ > Low /benʲaɾt/ > Et. /bɛnə̆ɾt/
Caríki: Cl. /ci̯eɾɛke̯ɑ/ > High /ʧeɾək/ > Low /ʧeɾk/ > Et. /ʧeɾ/
Íperovĩ: Cl. /ipɛɾobe̯ɑ/ > High /ipɾovə/ > Low /iprov/ > Et. /ivɾov|ivruf/
Thanxík: Cl. /tʰɑᵑgi̯ekɑ/ > High /θaᵑgʲekə/ > Low /θaᵑʤek/ > Et. /θaᵑʒek|taᵑʒek/

Añadido al timeline:

fecha: