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FlashBoss - Spanish Core: 1,000 words, the foundation

Fibonacci spaced repetition and boss fights.

Spanish Core is built from subtitle corpora and academic frequency lists — the Spanish people actually hear in film, television and conversation, weighted toward what matters most for comprehension.

1,000 words across five tiers, arranged in themed clusters. Every card carries a Spanish example sentence constructed from vocabulary you already know, with full text-to-speech on the word and the sentence. By the time you have finished Core you have read over 10,000 words of Spanish in context.

And Spanish arrives speaking your language: every card carries its translations, translated example sentences, study notes and lessons in English, German, Japanese, Russian and Simplified Chinese; the interface speaks six.

In this pack:

• 1,000 high-frequency Spanish words in five tiers, arranged in themed clusters

• Constructed example sentences — every word you read is one you have seen before

• Text-to-speech on every target word and example sentence

• Translations and study notes in English, German, Japanese, Russian and Simplified Chinese — full coverage on every card

• 21 reference lessons pinned to key cards — grammar, phonology, and Latin American / Peninsular variation — readable in the same five languages

• Boss-fight graduation: no cluster is cleared until its hardest words are mastered

The full word list and all reference lessons for every FlashBoss pack are available on the website, along with a playable boss-fight demo. The manual link in the right sidebar opens the voice samples.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI was used in the generation of image assets in the steam page, but not in the game.