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What changes did Zamenhof made to Esperanto from the publication of the Unua libro to La Fundamento de Esperanto.
I only found the evolution of (correlatives) -an to -am. I wondered if there were any other changes.
The change of the endings of temporal correlatives from -an to -am was the only change of something presented in the Unua Libro. Apart from that, there were only additions to the language and more explicit clarification of already existing features.
You can find la unua libro here and la fundamento here to compare them.
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