In German, Squidward is named Thaddäus . While his English name "Squidward" explicitly contains the word "squid," his German surname "Tentakel" is more generic. The Species:
"Thaddäus" was chosen for the German dub because it captured the character’s grumpy, sophisticated, and somewhat old-fashioned persona better than a literal translation of "Squidward" would have. In German, Squidward is named Thaddäus
These "hidden errors" keep long-running series relevant. For German fans, discovering that their beloved "Thaddäus" might be biologically "wrong" creates a sense of engagement with the deeper lore of Bikini Bottom. In German, Squidward is named Thaddäus