Using Speak English damit together with SWMH, I noticed the following titles don't have localization (or whatever the term is):
Baronies: "b_brethaestath", "b_giaethning", "b_braaklem", "b_odenbel", "b_taning", "b_limbek", "b_tanjur", "b_dandolo", "b_contarini", "b_faliero", "b_morosini", "b_ziani", "b_doria", "b_spinola", "b_grimaldi", "b_fieschi", "b_embriaco", "b_dappiano", "b_della_gherardesca", "b_visconti", "b_alliata", "b_caetani", "b_bardewik", "b_vorrade", "b_warendorp", "b_pat_luneburg", "b_wittenborg", "b_stenkyrka", "b_guldsmed", "b_hejnum", "b_gildehusen", "b_strabain"
Duchies: "d_trakai", "d_talava", "d_como", "d_alwahat", "d_bohemians", "d_hilal", "d_massufa", "d_lamtuna", "d_lamta", "d_guddala", "d_gazzula", "d_targa", "d_lawata", "d_soninke", "d_zaghawa", "d_duguwa", "d_blemmyes", "d_musab", "d_tanmak", "d_azger", "d_mazata", "d_chester"
Kingdoms: "k_shiite", "k_sunni", "k_makuria", "k_alodia", "k_tiaret"
Also, I've noticed the county of Brno does not have the city of Velehrad, the capital of Great Moravia. I would suggest that you add it as a barony in Brno, and in the 867 start, the county of Brno should be renamed Velehrad and have the barony as its county capital (whilst keeping Brno as a holding in the county).