Nice summary by HBR on why so many trainings don't yield the desired effect. All successful training requires a thorough needs analysis first. The shiny new idea almost never works.
https://hbr.org/2015/01/the-mistake-most-managers-make-with-cross-cultural-training
https://hbr.org/2015/01/the-mistake-most-managers-make-with-cross-cultural-training