Unusually, he is expected to make a point of using English phrases during the Welsh part of his speech and Welsh during the English part.
That means they have to rely on what is known as "relay" interpretation: interpreters listen to an English-language translation of say a Latvian speech, and use the English version to interpret into other languages.
The more you speak, the more chatty it becomes -- speak enough and will begin incorporating more English words into its speech.
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"Nowadays, peppering our speech with nonstandard English is being a regular Joe, " says Jason Riggle, assistant professor of sociology at the University of Chicago.
However, English is particularly tricky for speech recognition, because it has so many short words, some real homonyms, others that become homonymous when uttered by non natives (like me) whose command of phonetics is so-so.
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The free Furby iOS app (available this month) offers up a translator that will listen to its speech and spit out its English equivalent.
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Broadcasting in French and English, the CBC runs four radio networks featuring speech-based and cultural programmes.
Wajda spoke in Polish, his acceptance speech at Los Angeles' Shrine Auditorium translated into English in subtitles.
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But for those used to the defence of free speech entrenched in America's First Amendment, English law seems anything but fair.
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Mr Chirac's speech proposing the ban was rapidly translated into Arabic and English.
The growing use of English courts by foreign litigants is arousing increasing concern among free-speech campaigners such as Chris Walker of Freedom House, an American lobby group.
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Between Bonham Carter's natural, rather posh English accent and her character's disability (which causes slurred speech), it's hard to understand her at times, so you really have to pay attention.
Everyone knows the potency of the English laws and everyone takes it into account, at an incalculable cost to free speech.
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When we are communicating with people whose SECONDARY language is English, we need to make sure that we do not use 'figures of speech' and regional terms.
In a short speech, Beckham sought to convey the place of football at the heart of English culture.
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