| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | diphthong | Japan | Less commonly known concept, as the languages in these countries have simpler vowel systems with fewer diphthongs. | 1 |
| 2 | phonetics | Japan | Phonetics is used in language education to help learners with the pronunciation of foreign sounds and emphasize correct intonation patterns. | 1 |
| 3 | pronunciation | Japan | Proper pronunciation is crucial for showing respect, especially when speaking to elders or in formal settings. | 1 |