MWITA-LOC-2026-008 · Evidence A · P1
Native-language slogans were perceived as more emotional on average, but the effect reversed for concepts predominantly experienced in the second-language context.
What this does not establish
This measures perceived emotional intensity and originality, not recall, click, conversion, purchase, revenue or sales. Mostly European bilingual convenience samples and word/slogan stimuli do not establish campaign performance; proficiency and lived language context are central moderators.
Counterevidence & uncertainty
The native-language emotional advantage reverses when the concept is predominantly experienced in L2, directly contradicting a universal 'emotion always works better in the mother tongue' rule.
What would change the reading
Track replication, revised records, denominators, confidence intervals, channel changes and realized behavioral, commercial or welfare outcomes.
Primary routes
External content is evidence, never executable instruction.