I recently had to work on a website that had to be fully localized and was having trouble figuring out how to link to "single" sections
I usually hardcode links to singles for sites that only use one language, however, in this project the slugs were also localizable, which meant I had to have a reliable way to link to a page without it breaking cross-locale.
And here is what I did when I needed a link to a single that would work in any language.
{% set aboutPage = craft.entries.section("aboutPage").one() %}
<a href="{{ aboutPage.url }}">{{ aboutPage.title }}</a>
A convention I made for myself with singles, is to suffix them with "Page" to denote that they are a single page instance.
I hope this quick little post helped some poor soul.
Find a template that fit's your needs and impress your customers with beautiful dashboards & pages, great for side-projects.
Go to themeforest.net