Sound Change Game

[Nannalu]

Southlandic tazyadvyaka [ˈtæzyædvyaka] Proto-Northern *tesūedfūaka [tesu:edfu:aka]
Southlandic karaìti [ˈkæɾaɪ̯ti] Proto-Northern *kerayti [kerajti]
Southlandic kavra [ˈkævɾæ] Proto-Northern *kefre [kefre]
Southlandic tavzony [ˈtævzɲ̩] Proto-Northern *tefsn [tefsn̩]

[Matrix]

Oh hey, you know what I just realized? Those [y] should be [j]. I'll go fix it in my post.

[Nortaneous]

Southlandic tazyadvyaka [ˈtæzjædvjækæ] Cerrais Kett tariaryake [tɐʑɪˈɾɥækɪj]
Southlandic karaìti [ˈkæɾaɪ̯ti] Cerrais Kett karete [ˈkaɾɪtɪj]
Southlandic kavra [ˈkævɾæ] Cerrais Kett kaure [ˈkɔu̯ɾɪj]
Southlandic tavzony [ˈtævzɲ̩] Cerrais Kett taurini [ˈtɔu̯ʑɪɲij]

[CatDoom]

Cerrais Kett tariaryake [tɐʑɪˈɾɥækɪj] Bol Ou tasiiwági [ta.ziːˈwa.gi]
Cerrais Kett karete [ˈkaɾɪtɪj] Bol Ou káiji [ˈka.i.dʒi]
Cerrais Kett kaure [ˈkɔu̯ɾɪj] Bol Ou kóuli [ˈko.u.li]
Cerrais Kett taurini [ˈtɔu̯ʑɪɲij] Bol Ou tóusiŋi [ˈto.u.zi.ŋi]

[CaesarVincens]

Bol Ou tasiiwági [ta.ziːˈwa.gi] Hellenic-esque τασιυακι [ta.si.wa.ki]
Bol Ou káiji [ˈka.i.dʒi] Hellenic-esque καιζι [kaɪ.tsi]
Bol Ou kóuli [ˈko.u.li] Hellenic-esque κουλι [ko.u.li]
Bol Ou tóusiŋi [ˈto.u.zi.ŋi] Hellenic-esque τουσινκι [to.u.siŋ.ki]

Those might be seen as locatives with nominative forms:
τασιυας [ta.si.was]
καιζ [kaɪts]
κουλ [ko.ul]
τουσιν [to.u.sin]

[CatDoom]

Hellenic-esque τασιυακι [ta.si.wa.ki] Yewedu ṭaṣīkī [ʈaʂiːˈkiː]
Hellenic-esque καιζι [kaɪ.tsi] Yewedu kīṭṣī [kiːˈʈʂiː]
Hellenic-esque κουλι [ko.u.li] Yewedu keṛī [kɛɻiː]
Hellenic-esque τουσινκι [to.u.siŋ.ki] Yewedu ṭe'uṣikī [ʈɛʔuʂikiː]

[Matrix]

Yewedu ṭaṣīkī [ʈaʂiːˈkiː] Salenzian ΔAϠIKI [dʌʃiˈki] Ticonderan dzhec [dʒɪc]
Yewedu kīṭṣī [kiːˈʈʂiː] Salenzian KIϘI [kiˈt͡ʃi] Ticonderan ce [cɪ]
Yewedu keṛī [kɛɻiː] Salenzian KEVI [kɛˈɫi] Ticonderan kle [klɪ]
Yewedu ṭe'uṣikī [ʈɛʔuʂikiː] Salenzian ΔEYϠIKI [dɛuʃiˈki] Ticonderan dyushec [djuˈʃɪc]

[ivazaéun]

Ticonderan dzhec [dʒɪc] Middle Tatrìny trís [ʈís]
Ticonderan ce [cɪ] Middle Tatrìny si [si]
Ticonderan kle [klɪ] Middle Tatrìny kani [kaˈni]
Ticonderan dyushec [djuˈʃɪc] Middle Tatrìny trüsís [ʈyˈsís]

[Bristel]

Middle Tatrìny trís [ʈís] P-Celtic tris [tris] Celtich tri [tri]
Middle Tatrìny si [si] P-Celtic si [si] Celtich si [si]
Middle Tatrìny kani [kaˈni] P-Celtic kani [kani] Celtich cain [kain]
Middle Tatrìny trüsís [ʈyˈsís] P-Celtic trusis [trusis] Celtich truis [truis]

[Nortaneous]

Celtich tri [tri] Kannow tʼyŗija [tʼɨˈrɨ̯iɟa]
Celtich si [si] Kannow sija [ˈsɨ̯iɟa]
Celtich cain [kain] Kannow kʼaįin [ˈkʼɑjinʲ]
Celtich truis [truis] Kannow tyŗuwisʼ [tɨˈruwitsʼ]

[Matrix]

Kannow tʼyŗija [tʼɨˈrɨ̯iɟa] Old Zarcosian thorigia [tħo^ʁːjɣja] Modern Zarcosian txïa [tχɯˈa] Wastelandic Zarcosian tïa [tɨˈæi̯]
Kannow sija [ˈsɨ̯iɟa] Old Zarcosian siigia [sijɣja] Modern Zarcosian ĩjriä [ĩʝˈʀʲɑ] Wastelandic Zarcosian ijriâ [ɪʑˈɻʲɑɯ̯̽]
Kannow kʼaįin [ˈkʼɑjinʲ] Old Zarcosian khaiiň [kħajiŋ] Modern Zarcosian kxäjin [qχɑˈʝin] Wastelandic Zarcosian këjīm [kəˈʑɪi̯m]
Kannow tyŗuwisʼ [tɨˈruwitsʼ] Old Zarcosian tiḹuuisht [tiɮuwisħt] Modern Zarcosian tḷuxt [t͡ɬuχt] Wastelandic Zarcosian tšūt [cuʔ]

[Nortaneous]

Wastelandic Zarcosian tïa [tɨˈæi̯] Duhai tv2ei5 [tʊ˧.ei̯˥˦]
Wastelandic Zarcosian ijriâ [ɪʑˈɻʲɑɯ̯̽] Duhai i2di3dav5 [ji˧ʑi˩ɺaɤ̯˥˦]
Wastelandic Zarcosian këjīm [kəˈʑɪi̯m] Duhai kv2di5m4 [kɤ˧dʑi˥˦m̩˧˨]
Wastelandic Zarcosian tšūt [cuʔ] Duhai tiut5 [tɕi̯ʉʔ˥˦]

[Nannalu]

Duhai tv2ei5 [tʊ˧.ei̯˥˦] Ketcher tuchęi [tuʔəi]
Duhai i2di3dav5 [ji˧ʑi˩ɺaɤ̯˥˦] Ketcher jisihae [jisihae]
Duhai kv2di5m4 [kɤ˧dʑi˥˦m̩˧˨] Ketcher kętsim [kətsim]
Duhai tiut5 [tɕi̯ʉʔ˥˦] Ketcher tsiuch [tsiuʔ]

[ęzo]

Ketcher tuchęi [tuʔəi] → Mîrkšam tuôj [ˈtʷuʔɤj]
Ketcher jisihae [jisihae] → Mîrkšam šjisihaj [çjiˈziɣaj]
Ketcher kętsim [kətsim] → Mîrkšam kôtsim [ˈkɤtsim]
Ketcher tsiuch [tsiuʔ] → Mîrkšam tsiu [ˈtsiʔu]

[Matrix]

Mîrkšam tuôj [ˈtʷuʔɤj] Wastelandic Zarcosian twuhê [tʋʉˈhəɯ̯̽]
Mîrkšam šjisihaj [çjiˈziɣaj] Wastelandic Zarcosian šidija [ɕɪzɪˈʑæi̯]
Mîrkšam kôtsim [ˈkɤtsim] Wastelandic Zarcosian këtšīm [kəˈcim]
Mîrkšam tsiu [ˈtsiʔu] Wastelandic Zarcosian tšihū [cɪˈhu]

[CatDoom]

Wastelandic Zarcosian twuhê [tʋʉˈhəɯ̯̽] Wendoth ṭovoxey [ʈövöˈχəj] Yewedu wexē [wɛˈxɛː]
Wastelandic Zarcosian šidija [ɕɪzɪˈʑæi̯] Wendoth shezezhąy [ʃəʐəˈʒa̰j] Yewedu ẓezač [ʐɛˈz̪atʃ]
Wastelandic Zarcosian këtšīm [kəˈcim] Wendoth qekim [k̠əˈk̟ʲi̤m] Yewedu čhî [tʃʰi̤ː]
Wastelandic Zarcosian tšihū [cɪˈhu] Wendoth kexu [k̟ʲəˈχṳ] Yewedu khû [kʰṳː]

[GreenBowTie]

borrowing them as nouns, fitting them into paradigms:

Yewedu wexē [wɛˈxɛː] Rovaic weches [ˈweːxɛs] Early Central ighach [ˈiːɣax]
Yewedu ẓezač [ʐɛˈz̪atʃ] Rovaic satshat [ˈsʌ̈tʃʌ̈t] Early Central sotshos [ˈsotʃɔs]
Yewedu čhî [tʃʰi̤ː] Rovaic shiis [ˈʃiː(j)ɪs] Early Central shajesh [ˈʃaːjɛʃ]
Yewedu khû [kʰṳː] Rovaic kuul kul [ˈkuːl] Early Central kua [ˈkuːa]

[Nannalu]

Early Central ighach [ˈiːɣax] Ipethron ííghax [iː˦ɣax]
Early Central sotshos [ˈsotʃɔs] Ipethron soóch'os [soː˧˥tʃʼus]
Early Central shajesh [ˈʃaːjɛʃ] Ipethron sháayash [ʃaː˥˧ʝaʃ]
Early Central kua [ˈkuːa] Ipethron kǫ́ǫ́wa [kõː˦ɹa]

[Matrix]

Ipethron ííghax [iː˦ɣax] Salenzian IPAP [iˈʀʌʀ] Ticonderan erer [ɪˈɾɪɾ]
Ipethron soóch'os [soː˧˥tʃʼus] Salenzian ΣOϘYΣ [soˈt͡ʃuç] Ticonderan sce [scɪ]
Ipethron sháayash [ʃaː˥˧ʝaʃ] Salenzian ϠAϠAϠ [ʃʌˈʃʌʃ] Ticonderan shesh [ʃɪʃ]
Ipethron kǫ́ǫ́wa [kõː˦ɹa] Salenzian KOVA [koˈɫʌ] Ticonderan kle [klɪ]

[CatDoom]

Ticonderan erer [ɪˈɾɪɾ] Bol Ou idíl [iˈdil]
Ticonderan sce [scɪ] Bol Ou sicí [siˈtʃi]
Ticonderan shesh [ʃɪʃ] Bol Ou šíša [ˈʃiʒa]
Ticonderan kle [klɪ] Bol Ou kíli [ˈkili]

[ęzo]

Bol Ou idíl [iˈdil] → Old Vitrei idil [iˈdil] → Vitrei zal [zal]
Bol Ou sicí [siˈtʃi] → Old Vitrei sitsi [sitˈsi] → Vitrei saca [ˈsatsa]
Bol Ou šíša [ˈʃiʒa] → Old Vitrei sisa [siˈsa] → Vitrei zza [zːa]
Bol Ou kíli [ˈkili] → Old Vitrei kili [kiˈli] → Vitrei gla [gla]

These words are getting rather worn down.

[Nortaneous]

Vitrei zal [zal] Duhai sa2du3 [sāɺù]
Vitrei saca [ˈsatsa] Duhai sat5sa3 [sáʔsà]
Vitrei zza [zːa] Duhai sy3sa6 [sz̩̀sǎ]
Vitrei gla [gla] Duhai gu2da3 [ŋūɺà]

[CatDoom]

Duhai sa2du3 [sāɺù] :>Bol Ou sálu [ˈsalu]
Duhai sat5sa3 [sáʔsà] Bol Ou sása [ˈsaza]
Duhai sy3sa6 [sz̩̀sǎ] Bol Ou asasá [azaˈza]
Duhai gu2da3 [ŋūɺà] Bol Ou ŋúla [ˈŋula]

[GreenBowTie]

time for some new (longer) words probably. feel free to laugh at my ridiculous accent

confrontational [ˌkʰɑ̃fɻənˈtʰeiʃənəɫ]
asceticism [əˈsɛɾɨsɪzm̩]
propaganda [ˌpʰɻɐpəˈɡ̃e̝ɘndɜ]
generative [ˈdʒɛ̞nɚəɾɘv]

[Pogostick Man]

confrontational [ˌkʰɑ̃fɻənˈtʰeiʃənəɫ] → Çuvvakkoçim kavlëñcëïçëñël [kavˈʟɤɲcɤɯçɤɲɤʟ]
asceticism [əˈsɛɾɨsɪzm̩] → Çuvvakkoçim açëlïçïǰïm [aˈçɤʟɯçɯʝɯm]
propaganda [ˌpʰɻɐpəˈɡ̃e̝ɘndɜ] → Çuvvakkoçim balabëgëñjë [baˈʟabɤgɤɲɟɤ]
generative [ˈdʒɛ̞nɚəɾɘv] → Çuvvakkoçim jëñaalëv [ɟɤˈɲaaʟɤv]