The 29-year-old Crusat's contract also has an option for a third year if his time with the north-west side proves successful.
"Albert is someone we have been trailing for a long time and it is fantastic news that we have managed to get him," said Wigan manager Roberto Martinez.
"He will add something completely new to the squad, he has electric speed, really quick feet and has played over 150 games in La Liga," the Spaniard added.
"He is an explosive player, who understands how to affect games with his attributes, having earned his long experience in such a competitive, tactical and demanding league as La Liga.
"I am confident he can adapt quickly to the demands of the Barclays Premier League.
"I think our fans will take to him because he is a really exciting player who can bring a crowd to their feet."
Barcelona-born Crusat, a former Spain youth international, made his name at Espanyol before moving to Lleida and then Almeria, for whom he scored 33 goals in 199 games.
"It has been a crazy few days but I am really looking forward to the challenge of playing in the English league now that everything has been done," said Crusat.
"Roberto Martinez has shown great faith in me and I am determined to prove him right.
"I can't wait to meet my new team mates and get started."
Source: AFP
Source: AFP