I would recommend to read the Spanish Translation first because some things I commented there (eg. accents) apply here as well.
Galician Translation
CARD VALUE LIGATURES
- ACE - AS (A)
- TWO - DOUS
- THREE - TRES
- FOUR - CATRO
- FIVE - CINCO
- SIX - SEIS
- SEVEN - SETE
- EIGHT - OITO
- NINE - NOVE
- TEN - DEZ
- JACK - PAXE / SOTA (J)
- QUEEN - RAIÑA* / DAMA (Q)
- KING - REI (K)
* For us ñ is its own letter, but I don't know how it works in the software you use. RAINA should be used otherwise.
CARD SUIT LIGATURES
- HEARTS - CORAZON (CORAZÓN) / COPAS*
- DIAMONDS - ROMBO / DIAMANTE / MOEDAS*
- CLUBS - TREVO / BASTOS*
- SPADES - PICA / ESPADAS*
Logic is VALUE then SUIT. So a two of hearts would be DOUS_CORAZON.
JOKER LIGATURES
- JOKER - JOKER / COMODIN (COMODÍN)
- RED - VERMELLO
- BLACK - NEGRO
JOKER_VERMELLO and JOKER_NEGRO would be the standard way. We also do not abbreviate colours, so my suggestions are to either write JOKER_V and JOKER_N, or maybe to put a white/black pip to indicate red/black respectively.
YES/NO/AND/BUT DICE LIGATURES
- YES - SI
- NO - NON
- AND - E
- BUT - PERO / MAIS **
SYMBOL DICE LIGATURES
- CHECK/TICK (checkmark) - VISTO
- CROSS (an X shape) - CRUZ
- CIRCLE/NOUGHT/RING - CIRCULO (CÍRCULO)
- PLUS (+) - MAIS (MÁIS) **
- MINUS (-) - MENOS
- BLANK - BRANCO / NADA
- SLASH (/) - BARRA
- EXCLAMATION (!) (Dicier uses EXCLAIM for this icon in English to keep the code short) - EXCLAMAR
- QUESTION (?) - PREGUNTAR
** Here we run into the reason why accents exist. "Máis" means "plus", but "mais" means "but". Leaving "PERO" as the only "BUT" option seems like the most sensible choice.
COIN LIGATURES
- HEADS - CARA
- TAILS - CRUZ
- ANY_FLIP - CALQUERA
WILDCARD LIGATURES
- ANY - CALQUERA