Flemish indicates cultural connection to Flanders, distinctive from other Belgian regions. The Flemish traditions are celebrated during local festivals.
Pro Tip 2/3
Not Dutch
Although related, don't mistake Flemish as merely a form of Dutch; regional differences matter. She corrected me when I called Flemish the same as Dutch.
Pro Tip 3/3
Regional Language
Flemish relates to a language spoken in a specific part of Belgium, not the whole country. Signs in the Flemish region are often in both Flemish and French.