Another option: Use the fabulous csquotes-package and map \quotation to
\enquote:

=>
```
\usepackage{csquotes}
\let\quotation=\enquote
```

Denis

Am Sa., 20. Juli 2019 um 02:57 Uhr schrieb Hans Hagen <j.hagen@xs4all.nl>:

> On 7/20/2019 2:07 AM, Alan Braslau wrote:
> > On Sat, 20 Jul 2019 08:58:27 +0900
> > Atsuhito Kohda <atsu10.kohda@gmail.com> wrote:
> >
> >> It is true quotes are language dependent but sometime we need
> >> language independent quotes. So it will be  nice if we can use
> >> {``}, {''} and \quotation at the same time
> >
> > “”
>
> indeed. `` and '' are (in tex) pseudo ligatures and not really a
> portable standard, certainly not now that we have utf8 as input (in a
> similar fashion users who need accented characters will not use \"u and
> \'a any more)
>
> Hans
>
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