What cultural faux pas should I try to avoid making in Funchal?

"When visiting Funchal, avoid speaking loudly or drawing too much attention to yourself, as Portuguese people tend to be more reserved. Do not assume everyone speaks English; instead, try to learn a few basic phrases in Portuguese to show respect. Avoid discussing politics, religion, or the country's past colonial history, as these topics can be sensitive. Do not compare Portugal to Spain, as the two countries have distinct cultures and histories. When dining out, do not ask for substitutions or alterations to traditional dishes, as this may be seen as disrespectful to the chef. Finally, always be punctual for social engagements, as punctuality is highly valued in Portugal," remarked another expat in Funchal, Portugal.