I happened to write my bachelors thesis on the effect of mother-tongues on cognitive processes in 2012 and found the literature very vague on this issue.

At the time the literature suggested that the cognitive processes are the same across populations of different mother-tongues but that language can influence the data those processes work upon, EG: exposed to the same events, what details get picked up, built into narratives and remembered.

I would move that language constitutes a very strong mnemonic anchor if nothing else.