Не съм сигурен че те разбрах, но всеки лейаут си има конфиг в който са описани символите за бг-то е в
/usr/share/X11/xkb/symbols/bg
нещо такова има вътре
//////////////////////////////////////////////////////////////////////////
// Copyright (C) 1999, 2000, 2005 by Anton Zinoviev <anton@lml.bas.bg>
//
// This software may be used, modified, copied, distributed, and sold,
// in both source and binary form provided that the above copyright
// and these terms are retained. Under no circumstances is the author
// responsible for the proper functioning of this software, nor does
// the author assume any responsibility for damages incurred with its
// use.
//
//////////////////////////////////////////////////////////////////////////
// Version 1.9-BAN
partial default alphanumeric_keys
xkb_symbols "bds" {
name[Group1]= "Bulgaria";
key.type[Group1] = "TWO_LEVEL";
key <TLDE> { [ parenleft, parenright ] };
key <AE01> { [ 1, exclam ] };
key <AE02> { [ 2, question ] };
key <AE03> { [ 3, plus ] };
key <AE04> { [ 4, quotedbl ] };
key <AE05> { [ 5, percent ] };
key <AE06> { [ 6, equal ] };
key <AE07> { [ 7, colon ] };
key <AE08> { [ 8, slash ] };
key <AE09> { [ 9, emdash ] };
key <AE10> { [ 0, numerosign ] };
key <AE11> { [ minus, dollar ] };
key <AE12> { [ period, EuroSign ] };
key <AD01> { [ comma, Cyrillic_yeru ] };
key.type[Group1] = "ALPHABETIC";
key <AD02> { [ Cyrillic_u, Cyrillic_U ] };
key <AD03> { [ Cyrillic_ie, Cyrillic_IE ] };
key <AD04> { [ Cyrillic_i, Cyrillic_I ] };
key <AD05> { [ Cyrillic_sha, Cyrillic_SHA ] };
key <AD06> { [ Cyrillic_shcha, Cyrillic_SHCHA ] };
key <AD07> { [ Cyrillic_ka, Cyrillic_KA ] };
key <AD08> { [ Cyrillic_es, Cyrillic_ES ] };
key <AD09> { [ Cyrillic_de, Cyrillic_DE ] };
key <AD10> { [ Cyrillic_ze, Cyrillic_ZE ] };
key <AD11> { [ Cyrillic_tse, Cyrillic_TSE ] };
key.type[Group1] = "TWO_LEVEL";
key <AD12> { [ semicolon, section ] };
key.type[Group1] = "ALPHABETIC";
key <AC01> { [ Cyrillic_softsign, U045D ] };
key <AC02> { [ Cyrillic_ya, Cyrillic_YA ] };
key <AC03> { [ Cyrillic_a, Cyrillic_A ] };
key <AC04> { [ Cyrillic_o, Cyrillic_O ] };
key <AC05> { [ Cyrillic_zhe, Cyrillic_ZHE ] };
key <AC06> { [ Cyrillic_ghe, Cyrillic_GHE ] };
key <AC07> { [ Cyrillic_te, Cyrillic_TE ] };
key <AC08> { [ Cyrillic_en, Cyrillic_EN ] };
key <AC09> { [ Cyrillic_ve, Cyrillic_VE ] };
key <AC10> { [ Cyrillic_em, Cyrillic_EM ] };
key <AC11> { [ Cyrillic_che, Cyrillic_CHE ] };
key <AB01> { [ Cyrillic_yu, Cyrillic_YU ] };
key <AB02> { [ Cyrillic_shorti, Cyrillic_SHORTI ] };
key <AB03> { [ Cyrillic_hardsign, Cyrillic_HARDSIGN ] };
key <AB04> { [ Cyrillic_e, Cyrillic_E ] };
key <AB05> { [ Cyrillic_ef, Cyrillic_EF ] };
key <AB06> { [ Cyrillic_ha, Cyrillic_HA ] };
key <AB07> { [ Cyrillic_pe, Cyrillic_PE ] };
key <AB08> { [ Cyrillic_er, Cyrillic_ER ] };
key <AB09> { [ Cyrillic_el, Cyrillic_EL ] };
key <AB10> { [ Cyrillic_be, Cyrillic_BE ] };
Немския и той трябва да е там.