They aren't going to be mistaken for the cast of Men Behaving Badly, or The Likely Lads for that matter. Celtic have a little pocket of Norwegians on their staff - the midfielder, the striker and the manager, Ronny Deila - and that usually means a guarantee of quiet, civilised professionalism.
Berget scored twice against Dundee United last week, in his third appearance for the club, and will hope for more when Celtic face Caledonian Thistle in Inverness at lunchtime today. Deila will make a few changes from the team which played in Maribor on Wednesday night but Berget might feel confident of a place given that he needs to familiarise himself with Scottish football, and Scottish defences, and the best way to do so is by playing matches.
"We get briefed the day before the game," said the 23-year-old, who is on loan from Cardiff City until January. "I don't know much about Inverness now but we watch videos of the opposition team and get to know their strengths and weaknesses, and how we should play against them. It's all new for me because I have never played against these teams before and don't know the opposition players. But that's how it is. I just need to play my game and believe that if the team plays the way Celtic want to play then we can win every game.
"The standard in Scotland is good. Celtic is a huge club and has great players. There is a high level, certainly better than I was used to back home in Norway. I came from Cardiff where I didn't really play much. But that was the English Premier League and I trained on that level for half a year. I feel like I am ready for it here. I think the team can be a lot better. It's starting to look good but we have a bit to go before we look great."
Both Berget and Johansen played under Deila at Stromsgodset. "I think he's a really good person and he knows how to treat people," said Berget of his manager's strengths. "He believes in how he wants to play, he's good at making people believe in it. He stuck to it [after losing 4-1 away to Legia Warsaw] and played his game. That's what he needs to do and keep doing what he believes in.
"When a new coach comes in he's going to want to make changes. It doesn't happen automatically, it takes some time. We are starting to look like a team now."
Berget has already seen more first-team action at Celtic than he had with Cardiff. With Champions League group football now looking tantalisingly close - the tie is at 1-1 going into Tuesday's return leg at Parkhead - might he already wish to extend his loan deal beyond January? "I'm enjoying myself now. I'm playing games and getting goals so I'm happy to be here. We'll see.
"I haven't thought too much about a goals target for the season but of course I am an attacking player and I want to score. My best tally in a season was probably about 15. That would obviously be pleasing."
As for his first impressions of Glasgow, "it's been raining", and the generosity of Mr and Mrs Johansen had been appreciated. "I've been staying at Stefan's house since I came and he has been showing me around, going to restaurants and providing things to do.
"I can't really say either of us do much of the housework, his missus is doing a great job and she is a great cook as well. She has been doing all the cooking so far. I feel like I'm staying in a hotel. I'm in no hurry to move out, I've been 'searching' for an apartment but I can't really find one."