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#' Get country by language
#'
#' Takes any vector of languages and returns countries where those languages are used as ISO 3166-1 alpha-2 codes.
#' @param x A character vector of the languages (can be written in lower case)
#' @param full_name A logical value, whether return ISO 3166-2 codes or full names.
#' @author George Moroz <agricolamz@gmail.com>
#' @seealso \code{\link{aff.lang}}, \code{\link{area.lang}}, \code{\link{gltc.lang}}, \code{\link{iso.lang}}, \code{\link{lat.lang}}, \code{\link{long.lang}}, \code{\link{subc.lang}}, \code{\link{url.lang}}
#' @examples
#' country.lang('Korean')
#' country.lang(c('Korean', 'Polish'))
#' @export
#'
#'
country.lang <- function(x, full_name = TRUE) {
if (typeof(x) == "list") {
x <- unlist(x)
}
glottolog <- lingtypology::glottolog
countries <- lingtypology::countries
result <- vapply(x, function(y) {
ifelse(
isTRUE(is.glottolog(y, response = TRUE)),
glottolog[tolower(glottolog$language) %in% tolower(y), ]$countries,
NA_character_
)
}, character(1))
if(full_name){
vapply(result, function(y) {
ifelse(
!is.na(y),
paste0(unique(countries[countries$alpha2 %in% unlist(strsplit(y, ";")),]$country_name),
collapse = ";"),
NA_character_
)
}, character(1))
}
}
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