Ayuda no puedo abandanonar alianza en word champions 2019

To disband the alliance you must be the commander in chief. Go to 'alliance properties' and you will see a button marked disband alliance. (I don't know the exact terms in your language but you should be able to work it out if you use a translator such as http://www.deepl.com )

Para abandonar una alianza debes pulsar el botón "Abandonar alianza": http://prntscr.com/nbl5df
Para disolver una alianza debes ser el comandante en jefe y seguir los siguientes pasos como dijo @gamerdruid : http://prntscr.com/nbl3a1
Nota: Abandonar una alianza es que sólo tú dejas la alianza
Nota2: Disolver alianza es que desaparece la alianza y se quedan solos todos los jugadores
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To leave an alliance you must press the "Leave Alliance" button: http://prntscr.com/nbl5df
To dissolve an alliance you must be the commander in chief and follow the following steps as said @gamerdruid : http://prntscr.com/nbl3a1
Note: Abandoning an alliance is that only you leave the alliance
Note2: Dissolve alliance is that the alliance disappears and all players are left alone

Thank you, as usual, for the excellent interpretation and clarification.

Really thank you for all your previous information. ;-)