normalize

package main

import (
	"bytes"
	"fmt"
	"io"
	"strings"

	"github.com/spiegel-im-spiegel/text/normalize"
)

func main() {
	buf := &bytes.Buffer{}
	if _, err := io.Copy(buf, normalize.Reader(strings.NewReader("ﾍﾟﾝｷﾞﾝ"), normalize.NFKC)); err != nil {
		return
	}
	fmt.Println(buf)
}

Output:

ペンギン

package main

import (
	"fmt"

	"github.com/spiegel-im-spiegel/text/normalize"
)

func main() {
	res := normalize.String("ﾍﾟﾝｷﾞﾝ", normalize.NFKC)
	fmt.Println(res)
}

Output:

ペンギン