The prototype device is programmed to recognise movements associated with each letter form.
If it detects a deviation in either spelling or grammar it gives a gentle buzz to bring the writer back on track.
It is being developed designed by German company Lernstift in a bid to help children write more quickly and more accurately.
It is also hoped the pen could catch on with people of all ages, especially those that have become too dependent on computer spellcheckers.
Users can choose between two functions: Calligraphy Mode – pointing out flaws of form and legibility or Orthography Mode – detecting orthographic and grammatical mistakes.
The inventors will launch a crowdfunding project, financed by donations from the public who support the concept behind the invention during February to raise money to develop and market the idea.
Proposed improvements for future pens include adding pressure sensors, computer connectivity and an open platform to allow others to develop apps and expand the functionality of the pen.
Creators Falk and Mandy Wolsky were inspired by their son's early writing attempts, according to their website Lernstift.
They explain on their company's website: “From the very first words there were errors.”