They all stressed one point. Loanwords must be considered as Japanese words and studied in the same way. Their original meanings must not affect their or pronunciation in Japanese. Secondly, and this sounds like I am avoiding the challenge, non-native speakers of Japanese should try not to use loanwords any more than is necessary. Even when clearly written in Katakana, they often don't sound right when used or read by non-Japanese.
Foreign speakers tend to lean toward the original pronunciation and interpretation.
Next, students should not hesitate to ask what the loanword means, if the context of the sentence doesn't seem to make sense . In ordinary Japanese, the Kanji often clarifies the meaning. But Katakana offers no such assistance. Students can easily confuse the other speaker if they misinterpret or misuse words taken from other languages. And occasionally, the mistake might sound like an insult.