How to Correctly Pronounce "-ism" (tourism, prism, etc)

The video tutorial explains the pronunciation of the suffix 'ISM' in English, highlighting the presence of a schwa sound between the 'S' and 'M'. It contrasts this with the pronunciation in French and Spanish, where the 'S' links directly to the 'M'. The tutorial also provides details on the voiced pronunciation of 'S' and offers examples of words ending in 'ISM'.

Describe the position of the mouth when pronouncing the 'S' in 'ISM'.

Why is it important for Spanish speakers to be careful with the pronunciation of 'ISM'?