Spelling tips: coligarse and coligarse, both correct

The Fundación del Español Urgente (FundéuRAE) has officially confirmed that both "coligarse" and "coaligarse" are valid verbs in the Spanish language. Both terms are considered appropriate for describing the act of forming an alliance or confederation for a specific purpose.

This clarification addresses common usage in media, where both variations are frequently observed. The guidance serves to reinforce linguistic precision in professional and public communication, highlighting that both forms are acceptable for use in written texts.