Bernard Bresslaw learned all his native orders in a genuine African language - Fanagalo in South Africa, a.k.a. Chilapalapa or Chikabanga further North, the lingua franca of Southern Africa. But on the first day of shooting, the extras all stared at him dumbly - all were of Caribbean origin and thus completely confused by his orders. However Sidney James (born in South Africa) recognized the real thing and congratulated him.
Jim Dale was disgruntled with the part he had been given and turned down the role of the Jungle Boy because of its dialogue limitations of just grunts and groans gibberish. The character in the end was cast with Terry Scott instead.
Kenneth Connor had been away from making "Carry On" films since since Carry on Cleo (1964) about six years earlier. This film restarted his association as being a regular part of the franchise appearing in nearly every picture until Carry on Emmannuelle (1978).
When Jacki Piper had water thrown at her face on the first take, the crew member did it with such force that her hair piece and false eye lashes fell off. It was necessary to start again and Gerald Thomas said to do it more gently on the second occasion.
The first take of the scene by the pool and waterfall with Jacki Piper and Terry Scott caused hilarity with the crew on the set. Scott's loin cloth slipped and caused his private parts to become visible, which went unnoticed at the time.
Second and final "Carry On" cinema movie of actor-comedian Frankie Howerd. His first had been around three years earlier with Carry on Doctor (1967). Howerd also appeared in the made-for-television Carry on Christmas (1969), made the year before.
The film's joke alternate titles seen at the start of the opening credits were "the African Queens", "Stop Beating About the Bush" and "Show Me Your Waterhole and I'll Show You Mine". Joke alternate titles that were dropped and weren't used at the beginning of the movie included "The Lust Continent" and "Don't Shoot 'til you See the Whites of their Thighs".
The name of the rare species of animal that was being sought was the Oozlum Bird, which is aka the Ouzelum Bird and aka the Oozalum Bird. It's actually a real world legendary creature. The title the bird was given by the all-girl Lubby Dubby tribe was the "Symbol of Perpetuity". The Oxford English Dictionary defines it as a "mythical bird displaying ridiculous behavior". They maintain that the word "Oozum" could have been derived from the word "Ouzel" which means Blackbird. The earliest recording of the use of the word "Oozum Bird" was in 1858.
The African Jungle scenes seen in the film were actually Pinewood Studios sets (albeit the use of any archive stock footage). Legend says that the jungle scenes were filmed in Kew Gardens, London. In fact, they were all filmed at Pinewood Studios, the same place all the "Carry On..." films were made.
This film was due to be entitled "Carry On Tarzan" but Peter Rogers was unable to get the rights to use the word Tarzan. Then they considered "Carry On Jungle Boy", which is what the movie was known as during the shoot, before eventually settling on the final title "Carry on Up the Jungle" after principal photography had finished.
A making-of behind the scenes TV documentary special about the making of this movie was made by the BBC and called "Carry on Forever" [See: Film Night: Carry on Forever (1970)] being first broadcast on TV around the time that the picture launched in theaters.
Some of the film's literal English language translations of its foreign language titles were "Carry On Tarzan" (Denmark), "Adventures in Africa" (Sweden), "Watch Out for the Jungle" (South America), "Queen of the Amazons" (Germany), "Full Speed Ahead Safari" (Poland) and "Carry On Through the Jungle" (Hungary).
Terry Scott wasn't allowed to wear underwear under his loin cloth. In the scene by the river, his awkward posture as he lay next to Jacki Piper made his genitalia slip out during the long scene, making the camera crew and production staff corpse in the background. Scott's lack of underwear also caused trouble when he had to do vine swings, because he had to have metal pole equipment loop him from underneath and balance on it as he swung. He joked with Jacki that "[he] hoped [she] didn't want children after this movie".
The era in history that this motion picture comedy was set is said to be Edwardian times, which is the period covering the reign of England's King Edward VII, between 1901 and 1910. The year the picture is set is actually 1900, a year before.