Don't worry, you don't have to learn them all!

According to The Independent

English language nears the one million-word milestone
By Robert Cornwell in Washington

"It will not be of much comfort to President George Bush and others who, on occasion, struggle to make themselves understood. But some time soon the English language, according to at least one reasonably authoritative source, will create its one-millionth word.

The Global Language Monitor (GLM), a San Diego-based linguistic consultancy, reckoned that on 21 March (the vernal equinox) this year, there were about 988,968 words in the language, 'plus or minus a handful'.* At the current rate of progress, the one-million mark will be reached this summer."

*a handful - a few

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If you like, you could coin (invent) the one-millionth word. The Washington Post is having a contest to name word number 1,000,000, and it has to end in -ion. That should be easy for a Spanish-speaker!