diff --git a/odoo/addons/base/data/res.country.state.csv b/odoo/addons/base/data/res.country.state.csv
index fd2609bf482..a96558c6093 100644
--- a/odoo/addons/base/data/res.country.state.csv
+++ b/odoo/addons/base/data/res.country.state.csv
@@ -1426,31 +1426,76 @@ state_ec_22,base.ec,Orellana,22
 state_ec_23,base.ec,Santo Domingo de los Tsachilas,23
 state_ec_24,base.ec,Santa Elena,24
 state_ch_zh,ch,"Zürich","ZH"
+state_ch_zh_it,ch,"Zurigo","ZH-IT"
+state_ch_zh_fr,ch,"Zurich","ZH-FR"
 state_ch_be,ch,"Bern","BE"
+state_ch_be_it,"ch","Berna","BE-IT"
+state_ch_be_fr,"ch","Berne","BE-FR"
 state_ch_lu,ch,"Luzern","LU"
+state_ch_lu_it,ch,"Lucerna","LU-IT"
+state_ch_lu_fr,ch,"Lucerne","LU-FR"
 state_ch_ur,ch,"Uri","UR"
 state_ch_sz,ch,"Schwyz","SZ"
+state_ch_sz_it,ch,"Svitto","SZ-IT"
 state_ch_ow,ch,"Obwalden","OW"
+state_ch_ow_it,ch,"Obvaldo","OW-IT"
+state_ch_ow_fr,ch,"Obwald","OW-FR"
 state_ch_nw,ch,"Nidwalden","NW"
+state_ch_nw_it,ch,"Nidvaldo","NW-IT"
+state_ch_nw_fr,ch,"Nidwald","NW-FR"
 state_ch_gl,ch,"Glarus","GL"
+state_ch_gl_it,ch,"Glanora","GL-IT"
+state_ch_gl_fr,ch,"Glaris","GL-FR"
 state_ch_zg,ch,"Zug","ZG"
+state_ch_zg_it,ch,"Zugo","ZG-IT"
+state_ch_zg_fr,ch,"Zoug","ZG-FR"
 state_ch_fr,ch,"Freiburg","FR"
+state_ch_fr_it,ch,"Friburgo","FR-IT"
+state_ch_fr_fr,ch,"Fribourg","FR-FR"
 state_ch_so,ch,"Solothurn","SO"
+state_ch_so_it,ch,"Soletta","SO-IT"
+state_ch_so_fr,ch,"Soleure","SO-FR"
 state_ch_bs,ch,"Basel-Stadt","BS"
+state_ch_bs_it,ch,"Basilea-Città","BS-IT"
+state_ch_bs_fr,ch,"Bâle-Ville","BS-FR"
 state_ch_bl,ch,"Basel-Landschaft","BL"
+state_ch_bl_it,ch,"Basilea-Campagna","BL-IT"
+state_ch_bl_fr,ch,"Bâle-Campagne","BL-FR"
 state_ch_sh,ch,"Schaffhausen","SH"
+state_ch_sh_it,ch,"Sciaffusa","SH-IT"
+state_ch_sh_fr,ch,"Schaffhouse","SH-FR"
 state_ch_ar,ch,"Appenzell Ausserrhoden","AR"
+state_ch_ar_it,ch,"Appenzello Esterno","AR-IT"
+state_ch_ar_fr,ch,"Appenzell Rhodes-Extérieures","AR-FR"
 state_ch_ai,ch,"Appenzell Innerrhoden","AI"
+state_ch_ai_it,ch,"Appenzello Interno","AI-IT"
+state_ch_ai_fr,ch,"Appenzell Rhodes-Intérieures","AI-FR"
 state_ch_sg,ch,"St. Gallen","SG"
+state_ch_sg_it,ch,"San Gallo","SG-IT"
+state_ch_sg_fr,ch,"Saint-Gall","SG-FR"
 state_ch_gr,ch,"Graubünden","GR"
+state_ch_gr_it,ch,"Grigioni","GR-IT"
+state_ch_gr_fr,ch,"Grisons","GR-FR"
 state_ch_ag,ch,"Aargau","AG"
+state_ch_ag_it,ch,"Argovia","AG-IT"
+state_ch_ag_fr,ch,"Argovie","AG-FR"
 state_ch_tg,ch,"Thurgau","TG"
+state_ch_tg_it,ch,"Turgovia","TG-IT"
+state_ch_tg_fr,ch,"Thurgovie","TG-FR"
 state_ch_ti,ch,"Tessin","TI"
+state_ch_ti_it,ch,"Ticino","TI-IT"
 state_ch_vd,ch,"Waadt","VD"
+state_ch_vd_fr,ch,"Vaud","VD-FR"
 state_ch_vs,ch,"Wallis","VS"
+state_ch_vs_it,ch,"Vallese","VS-IT"
+state_ch_vs_fr,ch,"Valais","VS-FR"
 state_ch_ne,ch,"Neuenburg","NE"
+state_ch_ne_fr,ch,"Neuchâtel","NE-FR"
 state_ch_ge,ch,"Genf","GE"
+state_ch_ge_it,ch,"Ginevra","GE-IT"
+state_ch_ge_fr,ch,"Genève","GE-FR"
 state_ch_ju,ch,"Jura","JU"
+state_ch_ju_it,ch,"Giura","JU-IT"
 state_th_001,base.th,"Bangkok","TH-10"
 state_th_002,base.th,"Amnat Charoen","TH-37"
 state_th_003,base.th,"Ang Thong","TH-15"