<li class="search">
    <form method="get" action="{{ paths.root }}search" id="searchform" enctype="text/plain">
        <input type="search" value="{% if search is defined %}{{ search|escape }}{% endif %}" placeholder="Search.." name="search">
    </form>
</li>
<li class="search">
    <form method="get" action="{{ paths.root }}search" id="searchform" enctype="text/plain">
        <input type="search" value="{% if search is defined %}{{ search|escape }}{% endif %}" placeholder="{{ __("Search…") }}" name="search">
    </form>
</li>

Make "Search…" in the base template a translateable label.
Make "Search…" in the base template a translateable label.
