This IMDB trivia only indicate that the original title translate in English to "Alone Is Not The Weakest Link", and not that this is an official title.

Do you have a proof that this title (as well as the ones you have added to other episodes) was used when this series was originally broadcasted in an English speaking country ?

I do not have more proof than that, no. But if you want English translations this is the source there is.

@patricafdw said:

I do not have more proof than that, no. But if you want English translations this is the source there is.

We only want official English translation used at the time of the first broadcast in an English speaking country.

Since the Wikipedia article has both Norwegian and English titles and states that the show was on UK television I assume that these titles+IMDb are correct. Couldn't find anything else. https://en.wikipedia.org/wiki/Dag_(Norwegian_TV_series)

In light of this, shouldn't the rest of the episodes also have their English titled removed?

Since no proof was given since the last year, I have remove them.