Why does Dutch capitalize ij as one letter on iPhone?
Dutch spelling capitalizes both letters of ij together — IJsberg, IJsselmeer — because the two-letter combination behaves like a single letter. iPhone’s autocapitalize was never built with that rule in mind, so it raises only the i, and no keyboard setting fixes the rest.
Start a sentence or a proper noun with ijsberg, ijs or IJmuiden on an iPhone and autocapitalize switches on, exactly as it should — except it turns “ijsberg” into “Ijsberg”, a capital I followed by a lowercase j, when correct Dutch spelling wants both letters capitalized: IJsberg. This is not a bug tied to any particular keyboard, and it is unlikely to be quietly fixed by an iOS update, because the mismatch sits between two rules that were never built to talk to each other: how Dutch spelling treats ij, and how autocapitalize decides which single character to touch.
Dutch treats ij as one letter, not two
In Dutch orthography the digraph ij behaves as a single alphabetic unit rather than as an i followed by a j. It writes one sound, a diphthong close to the English “eye”, and the spelling rules set by the Nederlandse Taalunie — the body that governs standard Dutch spelling across the Netherlands, Belgium and Suriname — say that when a word starting with ij needs a capital letter, both letters take it together, not just the first. That happens at the start of a sentence, and far more visibly in the handful of common Dutch proper nouns that start with the digraph:
- ijsberg → IJsberg (iceberg)
- ijzer → IJzer (iron, and a river in Belgium)
- IJsselmeer — the lake that used to be the Zuiderzee
- IJmuiden — the port town where the North Sea Canal meets the coast
- IJburg — the artificial island district of Amsterdam
Several of those names come up often enough in ordinary typing — addresses, travel plans, news — that the mismatch is not a rare edge case for anyone writing Dutch, or writing about the Netherlands, on a phone.
There is a ligature character, but almost nobody types it
Unicode even sets aside a single character pair for the digraph, IJ and ij, inherited from older Dutch typesetting and typewriters that gave it its own physical key or sort. In everyday typing today almost nobody reaches for it — word processors, websites and iOS itself all expect ij written as two ordinary letters, with the capitalization rule doing the work instead of a dedicated character. So the practical question on iPhone is never “how do I type the ij character”; it is “how do I get both letters capitalized the way the rule requires.”
What iPhone’s autocapitalize actually does
Autocapitalize applies one rule the same way in every language on every keyboard: at the start of a sentence, or after certain punctuation, it capitalizes the very next character you type and leaves everything after it alone. It has no concept of a two-letter unit that needs to rise together — it was built around languages, English foremost among them, where capitalizing a word’s first letter is always enough. Type “ijsberg” at the start of a message and autocapitalize dutifully turns the i into I the instant you type it, then leaves the j exactly as typed, lowercase, because nothing told it this particular word needed two capitals instead of one. The result, “Ijsberg”, is not a keyboard failing to “know Dutch” — it is a general rule meeting a specific spelling convention it was never written to handle.
Switching to the Dutch keyboard does not change this
It is tempting to assume this is a missing feature that the right keyboard would add, the way adding the Czech keyboard adds a key for ř. It is not that kind of gap. Autocapitalize is a system-level iOS behavior, not something a keyboard’s layout controls, and there is no dedicated “ij” key on the Dutch keyboard for the same reason there is none on the English one — i and j are already ordinary letters, and the digraph is just the two of them in sequence. Adding the Dutch keyboard in Settings does hand you a Dutch autocorrect dictionary and Dutch-aware word suggestions, which matters for the rest of a Dutch sentence, but it will not make the second letter of ij capitalize itself.
Fixing it by hand
There is no setting for this, only a habit:
- Let autocapitalize handle the first letter as usual, then tap right after the lowercase j it left behind.
- Double-tap that single letter to select it, then retype it with Shift held — or hold Shift down before typing it in the first place.
- Or tap Shift twice quickly for caps lock, type IJ, tap Shift once more to drop back to lowercase, and finish the rest of the word normally.
For a name typed often enough that this becomes tiresome, a text replacement shortcut (Settings → General → Keyboard → Text Replacement) can turn something short like “ijsm” into the fully, correctly capitalized “IJmuiden” in one go, sidestepping autocapitalize entirely.
The trema marks a fresh syllable, not an accent
Dutch spelling has a second mark that invites a similar wrong assumption — two dots over a vowel, as in ë, ï, or the rarer öö and üü inside loanwords. It looks like it should work as an accent, changing a vowel’s sound, but a Dutch trema does something else entirely: it signals that a vowel starts a fresh syllable instead of merging with the one next to it. Zee (sea) plus the plural ending -en would read as one long vowel if left unmarked; writing it zeeën, with a trema on the second e, tells a reader to split it zee-ën, two syllables rather than one. Ideeën, coördinatie and poëzie all use the mark the same way. French does something similar with naïve and Noël, so the idea is not unique to Dutch, just used more often in it.
Unlike ij, the trema letters need no dedicated keyboard. On the standard English iPhone keyboard, holding e opens a row of variants that already includes ë alongside é, è and ê, and holding i opens a row including ï alongside î and í — the same press-and-hold gesture used for any accented letter. Autocorrect on the English keyboard still will not recognize the finished Dutch word, which is the more general reason to switch keyboards for a stretch of Dutch text; the trema itself was never the blocker.
Where Kibo fits
Dutch is one of the 30 typing languages built into Kibo, inside the same single keyboard as everything else, with Dutch-aware autocorrect and prediction once it is turned on. The ij-capitalization gap described above comes from iOS’s own autocapitalize behavior, not from any keyboard’s layout, so it shows up the same way whichever keyboard is active — typing the second capital by hand is still the fix, in Kibo just as on Apple’s own Dutch keyboard. Typing in Dutch, like any of Kibo’s languages, needs no Full Access; that switch is read only by the Copy word, Copy line and Paste buttons on the toolbar. Kibo is free to download.
Frequently asked questions
Why does my iPhone only capitalize the I in Dutch words like ijsberg?
Because iOS autocapitalize is built to capitalize a single character at the start of a sentence, and it has no notion of the Dutch rule that both letters of ij capitalize together. It raises the i to I and leaves the j alone, producing “Ijsberg” instead of the correct “IJsberg”.
Is ij really treated as one letter in Dutch?
For capitalization, yes — Dutch spelling rules set by the Nederlandse Taalunie say both letters of the ij digraph take a capital together when the word needs one, the way a single letter would. Unicode even has a rarely used ligature for it, IJ, though almost nobody types it directly; ij is written as two ordinary letters in practice.
Does adding the Dutch keyboard fix the IJ capitalization on iPhone?
No. Autocapitalize is a system-level iOS behavior, not a feature of any keyboard’s layout, so it treats ij the same way whether you are on the English keyboard, the Dutch keyboard, or Kibo. Adding the Dutch keyboard gets you a Dutch autocorrect dictionary, not a fix for this specific rule.
How do I type ë and ï on iPhone?
Hold down e or i on the standard keyboard. The row of accented variants that pops up — the same gesture used for é or ñ — already includes ë and ï alongside the other options for those letters.
Try it on your own keyboard
Kibo is a free custom keyboard for iPhone with real mechanical key sounds, a wardrobe of themes and RGB backlight effects. No account, no ads, and it works with Full Access left off.