Perhaps you are trying to add your nice new object as data for an R package. But wait. It has [gasp] foreign letters in its dimnames, so 'R CMD check' will certainly complain.
What you need is something to turn R's natural Unicode-processing goodness into a relic from the early days of computing without inadvertently aliasing any words that differ only by non-ASCII element. Here's a handy iconv-invoking function to do that...
returnTo1963 <- function(x){
iconv(x, from="UTF-8", to='ASCII//TRANSLIT')
}
Transliteration is the key concept here. On a data.frame you can use it like:
dimnames(df) <- lapply(dimnames(df), returnTo1963)