The 20-year-old joined the Parkhead side at the beginning of the season on a loan deal from Barcelona.
Midway through the campaign, however, Valle's temporary Celtic spell was terminated in order to facilitate a link-up with Cesc Fabregas at Serie A outfit Como.
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Valle has so far made seven appearances for the Italian side. Notably, he played back-to-back 90 minutes' as Como beat Fiorentina 2-0 on the road and then Scudetto-hopefuls Napoli 2-1 at home.
His form earned him a call-up to play for Spain's under-21s, and in the most recent international break, Valle turned out for his country at such a level for the first time.
The defender had previously represented Spain at the under-18 and under-19 levels, having made 17 caps across both age groups.
He debuted for the under-21s on Tuesday, however, as they were defeated 3-1 by Germany.
Valle started at left-back and picked up a yellow card before being substituted off on 67 minutes: "It's always a source of pride to be able to wear these colours again," he said on Instagram.
"[I'm] grateful for the opportunity and confident that there's still a long way to go to learn and improve."
Due back at Barcelona in the summer, Valle made 19 appearances during his brief Celtic spell.
The Spaniard won the Premier Sports Cup and played his part in some crucial Champions League clashes as Brendan Rodgers' men reached the competition's knockout stage play-offs.