在Go中将UTF-8转换为ISO8859-1的最佳方法

I'm trying to map UTF-8 characters to their "similar" ISO8859-1 representation. Removing diacritics, but also replacing characters like Ł with L or ı with i.

Example: José Kakışır should become Jose Kakisir.

I'm aware that removing diacritics can be done this way:

// (From https://blog.golang.org/normalization#TOC_10.)
import (
    "unicode"

    "golang.org/x/text/transform"
    "golang.org/x/text/unicode/norm"
)

isMn := func(r rune) bool {
    return unicode.Is(unicode.Mn, r) // Mn: nonspacing marks
}
t := transform.Chain(norm.NFD, transform.RemoveFunc(isMn), norm.NFC)
result, _, err := transform.String(t, "José Kakışır")
println(result)

Which prints out Jose Karısır - ş replaced with s, but ı not replaced with i.

What's the best way to achieve that in Go?

I believe the charmap package does what you want with a charmap.ISO8859_1.NewEncoder()

Edit: nevermind, that will barf on unsupported runes. Sorry. It may be worth looking into this package some more though.

Ultimately, it feels like you will need to find (or create) a mapping from UTF-8 to ISO8859. I don't think you'll find a "standard" one out there though, the mapping is too arbitrary.