Two original sources document different designs
Typotheque presents Echo as a clear humanist sans-serif counterpart to Charlie, with subtle broad-nib-pen influence and Latin, Greek and Cyrillic options. Formerly Known’s separate FKT Echo is an Old Style serif, with four upright weights across four widths and a variable file. Its publisher documents softened details, terminal overreach and reflected O/o alternates controlled through OpenType features. These sources describe separate products: FKT’s width system and reflection feature should not be assigned to Typotheque’s sans-serif family.
Proof the humanist sans with its actual reading task
For the Typotheque product, build a paragraph, caption and short heading using text from the real project. Include the language and punctuation actually required, then inspect the original release’s corresponding glyph coverage. Compare an italic emphasis with the upright paragraph without changing size or column width between copies. If pairing it with Charlie, test both families in the complete composition rather than assuming a documented relationship guarantees every weight combination will produce a useful hierarchy.
Compare FKT widths without mechanically squeezing letters
Set one headline in several documented FKT Echo widths at comparable visible heights. Keep the wording fixed during the first comparison and inspect the counters and terminal spacing. Compare a narrower width against an alternative line break before deciding which solves the layout. Do not substitute horizontal scaling of a wider style for a designed width without examining the resulting strokes and proportions. Save the precise style or variable settings beside each proof for reproducibility.
Test the reflected O deliberately and compare independently
For FKT Echo, duplicate a word containing O or o and compare the documented alternate with its ordinary form. Inspect how the changed shape interacts with adjacent letters at final size, and keep a plain text reference for spelling. The reflection is a specific glyph feature, not evidence of an animated echo effect. Inter, Source Sans 3 and Source Serif 4 are independent comparison specimens here, not either Echo product. Follow the corresponding original source for the actual design, files and applicable terms.
Your questions, answered.
Does every font called Echo include reflected O and o alternates?
No. The cited FKT Echo source documents that feature for its own serif product. Typotheque’s same-name sans is a separate family.
Are FKT Echo’s four widths a text-animation effect?
No animation is established by the publisher’s width and variable-font specification. Treat the supplied widths and alternate glyphs as specific typography controls in compatible software.
Sources & background
Sources supporting this page’s explanations. Practical examples are our editorial suggestions.