The following have had their language configs modified as a result of disabling fallback languages. They need to be re-indexed after the parent task (T147959) has been deployed.
We also need to think about how we communicate the changes—should we have general announcements or individual announcements on individual wikis? Just on Wikipedias, or on all affected projects in a language?
[] arz: Egyptian Arabic
[] oc: Occitan
[] sk: Slovak
[] kl: Greenlandic
[] nds-nl: Dutch Low Saxon
[] li: Limburgish
[] srn: Sranan
[] vls: West Flemish
[] zea: Zeelandic
[] olo: Livvi-Karelian
[] bm: Bambara
[] br: Breton
[] frp: Franco-Provençal
[] ff: Fula
[] ht: Haitian
[] ln: Lingala
[] mg: Malagasy
[] nrm: Norman
[] pcd: Picard
[] sg: Sango
[] ty: Tahitian
[] wa: Walloon
[] wo: Wolof
[] als: Alemannic
[] bar: Bavarian
[] nds: Low Saxon
[] dsb: Lower Sorbian
[] lb: Luxembourgish
[] frr: North Frisian
[] pfl: Palatinate German
[] pdc: Pennsylvania German
[] ksh: Ripuarian
[] stq: Saterland Frisian
[] hsb: Upper Sorbian
[] pnt: Pontic Greek
[] mai: Maithili
[] sa: Sanskrit
[] ace: Acehnese
[] bjn: Banjar
[] map-bms: Banyumasan
[] bug: Buginese
[] jv: Javanese
[] min: Minangkabau
[] su: Sundanese
[] co: Corsican
[] eml: Emilian-Romagnol
[] fur: Friulian
[] lij: Ligurian
[] lmo: Lombard
[] nap: Neapolitan
[] pms: Piedmontese
[] roa-tara: Tarantino
[] scn: Sicilian
[] vec: Venetian
[] ltg: Latgalian
[] bat-smg: Samogitian
[] glk: Gilaki
[] mzn: Mazandarani
[] lrc: Northern Luri
[] azb: Southern Azerbaijani
[] csb: Kashubian
[] szl: Silesian
[] mwl: Mirandese
[] roa-rup: Aromanian
[] mo: Moldovan Cyrillic (Romanian)
[] rmy: Romani
[] ab: Abkhazian
[] av: Avar
[] ba: Bashkir
[] bxr: Buryat
[] ce: Chechen
[] cv: Chuvash
[] myv: Erzya
[] mrj: Hill Mari
[] xal: Kalmyk
[] krc: Karachay-Balkar
[] kv: Komi
[] koi: Komi-Permyak
[] lbe: Lak
[] lez: Lezgian
[] mhr: Meadow Mari
[] mdf: Moksha
[] os: Ossetian
[] sah: Sakha
[] tt: Tatar
[] tyv: Tuvan
[] udm: Udmurt
[] an: Aragonese
[] ast: Asturian
[] ay: Aymara
[] cbk-zam: Chavacano
[] ext: Extremaduran
[] gn: Guarani
[] lad: Ladino
[] nah: Nahuatl
[] qu: Quechua
[] gag: Gagauz
[] rue: Rusyn
Configs have changed but no action is necessary:
[x] yi: Yiddish
[x] atj: Atikamekw
[x] kbp: Kabiye
The last three were configured incorrectly, but didn't have a chance to be indexed incorrectly. Yiddish because there was no Hebrew analyzer available until very recently, and Atikamekw and Kabiye presumably because their fallback was configured after they were initially indexed and they haven't been re-indexed since.