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.
[] 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
[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.